- The previous generation of slang for a blowjob was “head,” and brain is obviously the next better thing after head, so it seems natural that this is the current popular expression. Originating in the last five years through urban culture and music, “brain” has been showing up the newer raps of artists like Kanye West, Kid Cudi, and Lil Wayne.
Brain
noun; slang; zero derivation
Slang for fellatio
Etymology : The brain is in the head which is established slang for oral sex
Source : Circa 2007 in rap music of Kanye West (The Good Life) and Lil Wayne (We Takin Over)
Last modified: 8 December 2010