brain slut 

Someone who volunteers for research studies that mess with their brains (usually via psychoactive drugs) for some cash.

Danny signed up for 3 drug studies last week because he was broke, and went bat shit crazy...what a brain slut.

brain slut by clasw74 August 3, 2009

slut brain 

When your Dominant puts you so deep into subspace that all you can think about is the unyielding, intense desire to be fucked.

I love when my man puts his hands on me. He gives me such slut brain whenever I am around him!

slut brain by Vorsteher Agony May 7, 2021

Slut-Brain

The ability to shut or block off the part of the psyche that is responsible for developing emotional intimacy and connection during sex, rendering intercourse a pointless pleasuring event with no real "magic".

You don't need to actually like someone to sleep with them, it's all about physical gratification when ya got slut-brain.

Slut-Brain by Tam O September 5, 2016

Slut For Brains 

An insult used to call a person
who only knows how to be a slut
and lacks mental capabilities.

Can also be abbreviated as SFB.

KevBot: Wow, look at that SFB over there.
JenBot: Yeah she is definitely a Slut for Brains, she wouldn't know a rock from a squirrel.
KevBot: But she'd kiss it anyway.

Slut For Brains by Superguard October 13, 2008

brainsloth 

Jenn

A poop sex fene

brainsloth by Anonymous July 20, 2003