Yeahhhhh
A drunk reply to 1up your friend who has just responded yeahhhh
Friend:oh yeahhhh
You (drunkenly):oh yeahhhhh
You (drunkenly):oh yeahhhhh
yeahhhhh boiiiiiiiii
this is a phrase often used by Flava Flav, he is a worthless rapper that wears a clock as a necklace.
Flava Flav is in the new Bud Light commercial, and can be heard saying "yeahhhhh boiiiiiiiii."