When taken almost literally, it means someone is unintelligent or unequipped to talk to a specific person or about a subject. Although it has ironic connotations to mean that the interlocutor or the person they are speaking with is on another level/wavelength.
Compared to my friend, big brain Bojack, who is simultaneously discussing Kant's Deontology and Quantum Mechanical superposition, I have a small brain.
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A person whose intelligence is impaired either permanently or temporarily. The latter condition is most often associated with unexpectedly encountering other road traffic whilst sitting in the driving seat of a motor vehicle. See also halfwit moron cretin imbecile boy racer idiot muppet teenager
"No of course I'm not upset that you pulled out of a side road right in front of me, thereby endangering myself and my entire family. Think nothing of it, Prune Brain!"
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Someone who has smoked a viscous amount of methanphetamine creating a slurry of a brain/ someone with severe down syndrome
Toby the retard says what a lovely day
Reply- shut up P brain
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Someone thats been fucked in the ear and can now cum out of any part of their body because of all the cum in their head.
Cathleen is a fuck brain because she likes to get fucked in the ears.
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One who goes on and on talking about a topic or insisting something despite the reluctant listener. This term can be loosely used for many varying usages.
Example A: Spok, I've heard about your new car a thousand times. Stop digging my brain.
Example B: Uhura doesn't stop nagging me to go to the doctor, what a brain digger.
Example C: I was at Chekov's party yesterday, and there was this brain digger there that didn't stop talking to me. Eventually I just left.
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An unintentional orgasm without any real stimulation so it's all in your mind.
"Oh emm gee. I totally just had a brain gasm while laying down infront of the fan watching t.v."
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Damn you can make some fucked up yogurt with smegma brain.
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