You and your buddies gaming in jokes.

[bluerocker]

My old DnD group, back when I was first starting out, had an encounter where we were going to some rich dude's party. Because we were trying to dress up to blend in, but still wanted to be somewhat practical, my Paladin had a dress with a makeshift sheathe sewn into the back, so she could hide a bastard sword in case something bad happened.

Now, when trouble started, I innocently remembering that I needed to use two hands for this sword (because of how a bastard sword works, you need to take a proficiency feat to use it one handed; otherwise you incur a penalty) and said to the DM "I take out the two-handed sword I had stowed away!"

Cue one of our players going apeshit and saying "It's not a two-handed sword, it's a bastard sword!" and everyone ended up arguing over the semantics of this particular blade. Meanwhile, I just sat in a corner, kind of embarrassed because I remembered to forgo a penalty.

Thus, ever since, whenever someone got too caught up with semantics, the DM would declare "The bastard sword is not two-handed, moving on!"

 

[Fieldy409_v1legacy]

Resident Evil voice acting. We've been joking about it for I guess what is 20 years today. Especially Barry Burton. "OH MY COD!", "Jill Sandwich", "Wesker is a CRAZY man!", "BLOOD! Hope it's not.... CHRIS' BLOOD!" & "Do you think we can... SEE Tyrant?" never get old.

That reminds me of an old one. Where my friends and I played Summoner and I handed my copy around for everyone.

Every time a character levelled up they said the same damn things. The main character says 'I grow powerful' and we randomly throw that line at each other all the time.

 

[Balimaar]

"You're standing in my spot, sir."
"DAMN YOU REYNOLDS!"

I doubt that means much to anyone hear, but if I or one of my friend's says it at the right point in time during a game it'll draw riotous laughter.

SWAT 4! Now there were some good times especially with friends on Co-Op

 

[vashthblackseed]

I don't think I've had a single session of D&D/Pathfinder without at least 20 mins where we devolve into jokes and puns. We often produce such wonderful gems like:
A Solar with levels in Wizard would be an Arcanegel.
What did the fighter say when asked if he liked mutton? Sword of!
They say Superman can dig a canal faster than a speeding bulette.
Have you heard about Castle Ravenloft? They say the owner is a real pain in the neck.
What do wizards give out when they borrow money? IOUn stones!
When they make holy water, all they do is boil the hell out of it.
How do vampires flirt? They bat their eyes!
Good rogue armor is made of hide, but the best rogue armor is made of steal.
What is the most difficult requirement for becoming a lich? Learning their skull set!
Why did the ambush fail? It was Kobald together at the last minute!
How did the monster get so fat? He kept Goblin up all the snacks.
Why did the Rogue have so much HP? Because he was a CONman.

 

[aozgolo]

I have one buddy who mostly just plays war games like Total War and has quite the disdain for any Anime-inspired visuals in games, especially if it contains Japan's own brand of over-the-top tropes. He was making fun of some of the JRPGs he saw in my Steam Wishlist, and started calling them "Flying Cat Games" because of some goofy creature on the cover resembling a flying cat... now any JRPG or anime-themed game is automatically called a "Flying Cat Game"

 

[Extra-Ordinary]

I got two off the top of my head.

My first one comes from Assassin's Creed 2. My sister doesn't play but she was in the room when I got it so she was there for character introductions, Shaun Hastings' just stuck with us. "I'm Shaun Hastings". That's it, we don't find him incredibly interesting as a character, he doesn't introduce himself in any real memorable way, it just stuck with us for really no good reason. Now we say it whenever British characters introduce themselves. "I'm the Doctor", "I'm Shaun Hastings".

My second one comes from playing God Of War 3 with a friend of mine.
Clip's a bit longer than it needs to be for my purposes but here it is.


I was just *really* struck with how intensely Kratos shout's "You lie, Helios!"
Eventually I got a PS3 and a copy of GOW3 of my own and was able to introduce the joke to other friends, we used to shout that anytime we heard something that, well, wasn't true.

 

[FalloutJack]

I have a tabletop one that went on for a while, sometimes gets back up for an encore too.

Perhaps you're familiar with a game called Shadow Hunters, involving the war between two sides (Shadows and Hunters) and the Neutral characters caught in between. Long story short, this is a game of suspicion and intrigue as you try to figure out who is who and then proceed to kill them. At some point during a session, I started a bizarre epidemic:

I claimed to be Akbar, a humble shopkeeper who sounds - and the OP will probably appreciate this - alot like the merchant at the beginning of Aladdin. Repeated antics of claiming to be a shopkeeper at the Underworld Gate and trying to get people to buy things brought about much laughter, and the addition of a Stanislav, a Peyotr, and Pierre "Buy Baggette" bread-seller. Currently, due to repeated murderings, we are up to Akbar The Third, suave middle-eastern ninja-thief-merchant whose parents were somehow murdered before he was born.

 

[Strazdas]

I am Legion. I will not forgive. I will not forget. Everything will become Legion.

I play Ceasar/Rome in civ 5 multiplayer. I play domination. We run jokes around that. I tend to build up Rome due to bonuses for that nation so everyone ends up sending their caravans to Rome because its double the gold than anyone else. I then proclaim that all roads lead to Rome and most wars i get invoved with is people trying to block the caravan routes.

When we play Euro Truck simulator multiplayer we joke about fast breaking because my cousin constantly accidentaly turns off his engine which for some reasons in that game stops you far quicker than normal breaks. so basically anyone driving behind him in a caravan is 100% going to crash. We try not to do it to other folks because thats an easy way to get banned but inside our group we sort of made it a chalenge to survive an engine shutdown.

When we play World of tanks i like playing as artillery. There are times in some matches where all enemies are hidden. One of such times i proclaimed in global chat "Enemies, show yourselves" after which an enemy got spotted and instantly killed by combined fire of my artillery and my friends tank. This apperently stuck so much in my friends mind that he keeps joking about it every time enemies are in hiding.