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!
by Retro-Cat February 29, 2016
Get the fucked her brains out mug.
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.
Trey: "fucked her brains out "
Kevin: " damn she shaking?"
Trey: " hell yea"
Kevin: "my boi"
by Jaedyn <3 March 30, 2022
Get the fucked her brains out mug.
to have sex with (someone) energetically
If Paris Hilton was my girlfriend, I'd fuck her brains out.
by Atheer May 9, 2007
Get the fuck her brains out mug.
The act of shooting someone in the head with a large caliber round and proceeding to have sex with the bullet hole.
1 "Dude, I'm totally gonna fuck her brains out tonight."

2 "No man that's not cool, that's fucked up."

1 "You mean it will be."
by Jdhdiehdudbdunsd July 23, 2013
Get the Fuck her brains out mug.