Kilmore said:
For the barbarian who gets nothing right...
"I here to chew butt and kick bubblegum."
Another fine barbarian quote resource is Sergoi Aragones' excellent comic book "Groo."
we actually had a guy that gave us real quotes like that in game. He was a nice guy out of game, and always one to bring extra bottled water or soda & snacks... but, when it came to role-playing, he always put his foot in his mouth. Some examples:
On a long trek as a caravan guard, a female guard decides to hit on him:
Barbarian's response: "I do not walk that way with women." (He was trying to say that he only slept with women of his own tribe...)
DM, without missing a beat, as indignant female NPC: "well, you have plenty of choices for men around here then!"
Another time, as a 6'10" 300 pound powerhouse (he actually rolled on a chart for that and rolled very high!) visiting a land of people that were barely over 5 feet tall on average - so, he stuck out in a crowded festival. A young 8 year old tries to snatch his money pouch. She succeeds, but he spots her... rather than grab her, or laugh it off, this Chaotic Good barbarian yells, "Guards! she grabbed my pouch!!!"
Later that evening, at a festival dance, a petite little thing grabs him to dance. The rest of the group starts tossing coins at him (a festival tradition, as the girl was a barmaid and would use the cash as tips...), he gets flustered and shouts, "hey, you could put my eye out with that!"
So, this guy is always playing barbarians of questionable manliness it seems!