yeah guy
The guy who always does things that people sarcastically praise with a "YEEAHHHHH!" The guy will often say "YEAH!" himself too. The yeah guy exhibits barbaric characteristics, all of which might coincide with the common definition of a douchebag. The guy does things, such as smash a car window for no apparent reason or douse himself in beer, again, for no apparent reason, purely for the sake of being a chode. When people respond sarcastically with "YEAHHHH," it is an attempt to allude to the ridiculousness and irrationality of the yeah guy's said action.
Example:
Ed: Yo Marcus, I just fuckin' punched dat guy in da FUCKIN face in front of his girl.
Marcus: ....YYEAAHHH! THATS A REASONABLE THING TO DO! You're not clearly a yeah guy!
(unaware of the sarcasm, Ed responds)
Ed: YYEAAAHHH, I DON'T GIVE A FUCKKKK!!!!
Ed: Yo Marcus, I just fuckin' punched dat guy in da FUCKIN face in front of his girl.
Marcus: ....YYEAAHHH! THATS A REASONABLE THING TO DO! You're not clearly a yeah guy!
(unaware of the sarcasm, Ed responds)
Ed: YYEAAAHHH, I DON'T GIVE A FUCKKKK!!!!