Used for somebody that has done something stupid, or as a general mocking insult. From the word shlong
"you shlong for brains!!"
or
"Yo shlong for brains, how art thee?"
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From the television show, Mystery Science Theater 3000. Also called "Observer", the Brain guy is pale, wears a purple cloak over white robes and carries his brain in a petri dish. While possessing both Omnipotence and Omniscience, brain guy is rather lackadaisical in the goal of taking over the world, more content with observing. Despite claiming to not possess a body, Brain Guy does partake in activities like eating chili dogs and drinking beer.
Pearl Forrester: Brain Guy, get over here and save my bacon again!
An act of cupping ones hand over their own butthole, and farting into the hand, to later trap the gassiest stench while simultaneously whipping your hand out with great efficiency and speed to carefully keep the horrendous stench in your hand, then placing the hand under a poor unsuspecting target’s nostril. The stench will instantly travel up the nostrils and the sensation will smack the brain. Hence the term brain smacker
He brain smacked me.
He grabbed his fart and brain smacked me.
Brain smack means to catch your fart in your pants then throw it in someone’s face
"Why does he always stare at me? It creepy!"
"That's because he's a FROSTING BRAIN."
A Butane induced headache from consuming a cannabis concentrate not purged of the aforementioned gas.
I smoked too much of that generic brand shatter and end up with tane brain.
The thing we use to drive a flea around a hair strand
Pete: hey can i play kill a human being with you
Ronald: lol no you have the brain power of a pineapple pizza
when one is receiving fellatio and a second fellator joined, they are said to be keeping each other in 'brain company'
Dude, Tonya was just watching the whole time, until her and Andrea formed The Brain Company