Almost crazy. Bordering on "mental," which is completely insane.

One who acts like a retard, even though he does not have a condition of mental retardation.
Dude, I can't stand living with Jake anymore. He sits in the living room doing hot rails and playing World of Warcraft all day. I mean... the guy is driving me half mental!

That new kid is half mental. He smells like burnt onions, he can't dress himself and he always has mustard stains on his shirt.
by sc0ner June 19, 2010
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α person that always looks on the bright side of things.
She has α glass half full mentality. I want to be like her.
by hishdhhfkdj693674 May 9, 2021
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There is a message that doesn't happen to be the truth. There is a bunch of messages that don't happen to be the truth. Not "Almost crazy" in a definition that is to half mental. Not "Bordering on "mental," which is completely insane." Not "One who acts like a retard, even though he does not have a condition of mental retardation" in a definition to half mental.
by JordanJohnsonistheone October 18, 2023
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