He/she does not know anything about anything, he/she just either thinks about sex or he/she is just stupid to the max.
Person 1: You have a worse grade then me in math!
Person 2: But I have overall better grades fuck for brains.
Person 2: But I have overall better grades fuck for brains.
by Floptarts June 6, 2016
When a man fucks a woman so good she orgasms multiple times, trembles/shakes uncontrollably, is unable to speak properly and needs to sleep afterwords to recover.
Ted: Fucked me girlfriend last night good and proper, she couldn't speak properly afterwords.
Bob: Thats because you fucked her brains out man.
Ted: Fucking right i did!
Bob: Thats because you fucked her brains out man.
Ted: Fucking right i did!
by Retro-Cat February 29, 2016
when a man fucked a women so hard she had multiple orgasms and shakes her legs while she cant control it and also takes a fat ass nap afterwards.
by Jaedyn <3 March 30, 2022
To fuck for a long period of time..... Quickly. As in thrusting fast for hours. To make both man and woman climax multiple times in an hour. To make a head imprint or dent in a headboard.
by Sarahjinkens October 22, 2010
If Paris Hilton was my girlfriend, I'd fuck her brains out.
by Atheer May 9, 2007
Girl 1 "Henry came home yesterday horny as anything"
Girl 2 " Did you spend your night fucking your brains out?"
Girl 1 " Yep - we went at it all night like rabbits"
Girl 2 " Did you spend your night fucking your brains out?"
Girl 1 " Yep - we went at it all night like rabbits"
by Grandal's grammar August 23, 2016
One of the best orgasmic sexual experiences you will have with the opposite sex it’s hardcore and savage riding and thrusting and humping making each other’s head go back again and again like wild animals the best kind of sex
by Miao tai chi April 28, 2020