ThrobbingEgo said:
It'd be weird to call non-colas coke. It'd be to vague to call a specific drink pop or soda.
Colas are coke. It's rum and coke, not rum and Pepsi. Anything else fizzy I call pop.
Basically he is referring to the way people who are hanging out together refer to all sodas.
"Want to go get a pop?" "Want to go get a Soda?" or "Want to go get a Coke?"
Almost all of my friends called it Coke, even when they were getting 7-Up. That was in the South West. All throughout the mid-west (Up north and down south) people call it Pop. Texas or Michigan, it doesn't matter.
I remember that in Maine they used to call it Pop as well...