Fake mind-reading that celebrities such as Derren Brown practice on TV to look impressive, otherworldly, or mysterious, when it's all just psychology and not really that good.
That Derren Brown off the telly does mentalism to make himself look magic - what a cunt!
by TheHeianAlien August 22, 2019
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when something is absolutely insane, or just down right gnar.
That barrel was straight up mental
by Jote September 28, 2005
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meaning someone who is silly or stupid, usually for attention and in a random or sporadic way, involving nonsensical references and actions. usually violent or quick action involved, resulting in general amusement and hilarity of onlookers.
"hey look, archie's jumping off that cliff while holding a banana!"

"wow! he's mental!"
by arto October 11, 2005
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An adjective used to describe something pertaining to brain activity that is now used by gen z as a noun.
"I have been practicing a lot so I just need to work on my mental."
"We just need to make sure our mental is strong."
by _(N0S)_ May 13, 2019
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