Something you would have written on a T-shirt.

[ssgt splatter]

I'd put, "You were killed by a grenade, keep watch for the grenade danger indicator. Yeah, no shit Call of Duty. "

 

[The_root_of_all_evil]

A small red X in the top corner of a square.

Nerd humour.

 

[Grouchy Imp_v1legacy]

One for us nerds...

It's a fairly old joke but it gets me every time.

 

[utility6]

It would have to look like a tweet. "Warning: Wearer may have thoughts longer than 140 characters."

 

[sorpaqq]

How about the tagline Hypocrisy above a picture with egyptian slaves being brutally worked to death to make pyramids while laughing black tourists take photographs of the pyramids.

 

[Zantos]

The Daily Mash have quite a few I want:

"Daily Mail: Like spending 20 minutes in a mental hospital"
"I have no interest in your worthless, Ill-informed opinions"
"Curtains made of bastard"

and my personal favourite

"Gluten is not a thing"

If I got to make my own though, it would have a list of different forms of alcoholic beverage, and bits of stuff to write on to tally up how much I've drank.

 

[bobmus]

How about the tagline Hypocrisy above a picture with egyptian slaves being brutally worked to death to make pyramids while laughing black tourists take photographs of the pyramids.

I sense the dark arts are at work once more.
http://www.aesica.net/random/thread-necromancy.png
Incidentally, that'd make a great tee...

 

[Vern5]

Funny shirts I have:
-A shirt with a panicking monkey surrounded by monster bananas that says "All of my family is bananas!"
-A shirt with a pinata on it that says "I'd hit that"

Funny shirts I need:
-A shirt with a keg on it that says "I'd tap that"
-A shirt with a pack donkey on it that says "Back that ass up"
-a shirt with a two kittens boxing that says "Pussies can take a pounding"
-A shirt with the Troll face smoking a cigar on it.

 

[AdamxD]

The angels have the phone box.

If so, we're screwed :/.

 

[Hazy992]

''Thread necromancy is a wonderful practice''

 

[TheFunPolice]

It's already a shirt, but I can't think of anything better to put on a shirt

"Who the fuck is Mick Jagger?"

 

[Matthew Kjonaas]

Either "Never forget that I never cared." or "Wow I am so happy no one was sacrificed today, that I could just sacrifice someone." sorry if that offend you I just thought it was funny.