coombrain 

A person who excessively masturbates to the point of frying their own dopamine receptors.

Friend 1: Hey did you see Friend 3 accidentally leaked his PornHub account?
Friend 2: Yeah, he has over 2k+ videos watched. What a coombrain.

coombrain by MonasThighs January 31, 2021

Cumbrain 

A person obsessed with sex to the point where it becomes a detriment to their abilities to socialize and think through problems.

Mike keeps flirting with every girl he meets like a fucking cumbrain.

Cumbrain by Balanced Breakfast January 15, 2019

cumbrain 

Someone who thinks almost exclusively with their dick (or vagina) and goes on and on about porn and anime tiddies to the point of being annoying. Might also be an incel. Should probably have sex and stop watching so much porn so they can stop obsessing over it. Will likely argue that being interested in sex is natural or some bullshit, ignoring the fact that fapping 5 times a day isn't normal at all.

Person 1: What's your favorite Metroid game?
Person 2: For me, it's Samus. I WANNA FUCK SAMUS I WANNA FUCK THAT GAP IN HER THIGH WHEN SHE HAS HER SUIT ON AGGGHHHHH I WANT HER TO SUFFOCATE ME WITH HER TITS MOMMY MOMMY I WANT MILKIES RAGHGAHGAHGA I WANT A GF I WANT A GF GAHRUAWIGHAUHD
Person 3: Settle down, cumbrain

cumbrain by ebinvirgin August 1, 2019

cumbrain 

someone who is overly addicted to pornography and/or masturbation. the name has been originated and gained some popularity from 4chan.

person #1: “have you seen person #3? i didn’t find him at school today.”

person #2: “he’s probably at home watching porn as usual.”

person #1 “why does he never do anything but watch porn? he’s such a cumbrain..”

cumbrain by zaitra January 6, 2021

cockbrain 

when the male uses his cock as a secondary brain, often resulting in unfortunate choices and loss of girlfriend and or bodily harm caused by aforementioned girlfriend.

man i was so cockbrain last night, i had a great time but my girlfriend kicked me in the sack this morning

cockbrain by IMMA MAN December 3, 2009

Cumbrain 

An adjective used for someone who is constantly horny. To be used as insult to male who thinks about sexually activity 24/7.

"Yeah I kept asking her for nudes but she didn't send any."
"Stop begging for nudes and actually get a life you cumbrain."

Cumbrain by schoeymmii July 17, 2019

Cumbrain 

The average redditor, obsessed with hentai, porn and jacking off.

Ewwwww, Brian is such a cumbrain

Cumbrain by Doctor ball-tickler February 8, 2022