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Somone who is smart funny and fun to be around and used to trick people to think ur talking bout giving head
man i love to be around that girl shes a brainer
Brainer by gtman43 April 1, 2010
A brainer in when a person inhales marijuana smoke through their nose, sending it straight to the brain.
"Hey man, you wanna toke?"

"No, I'll just take a quick brainer!"
Brainer by Kanuckilish March 10, 2009
(noun) the cerebral equivalent of a boner; the act of being intellectually stimulated and titillated; when you have such a tantalizing and mentally arousing thought that your brain gets an erection.
I was scheming last night and devised such an ingenious plan that it gave me a raging brainer.
brainer by Mr_Blue November 20, 2019
The act of making a basic decision and bragging it's smart and unusual.
1- I'm worried about the high Covid infections atm so I'm wearing triple masks *smug face*

2- daamn, that's very smart brainer-boy
brainer by Kafka1 August 26, 2021
Mauritian creole language. It means a boy masturbating.
Get sa pilon la kuman p brainer.
Brainer by Spookydevilman79720 November 20, 2022

brainer lips 

someone who has rich full lips that are good for sucking dick
"wow that bitch has some huge brainer lips"
brainer lips by Justin F January 12, 2005