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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 18, 2010
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May 12 Word of the Day
When someone goes to the gym and spends 90% of the time on their phones scrolling through social media
Looks like its thumb day again for Jimmy with his usual routing... 3 sets of 5 snapchat selfies and 10 sets of scrolling through facebook until exhaustion
by Gary br April 02, 2017
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