by Milt Alwin March 19, 2009

noun. A person (particularly a female) who will gladly accept head but wont return the favor. Most commonly technical virgins who aren't yet accustomed to much sexual behavior. (Or simply just a prissy bitch)
Kenny: Hey you know any females that give good head?
Eli: Ohhh! how bout Jessica? Dude, I heard that girl swallows!!!
Kenny: wtf? Oh hell naw man she's definetely a no brainer. and her dad's a cop..you got me fucked up dawg.
Eli: Ohhh! how bout Jessica? Dude, I heard that girl swallows!!!
Kenny: wtf? Oh hell naw man she's definetely a no brainer. and her dad's a cop..you got me fucked up dawg.
by jajkbnkn January 24, 2011

'Man, I had to leave that girl alone. The p***y was good, but I found out she's a no brainer-she wouldn't give me any head!"
by dabbs October 20, 2008

Somone who is smart funny and fun to be around and used to trick people to think ur talking bout giving head
by gtman43 April 1, 2010

A brainer in when a person inhales marijuana smoke through their nose, sending it straight to the brain.
by Kanuckilish March 10, 2009

by Lewis1983 June 5, 2005

by cuban April 26, 2005
