To prepare oneself mentally.
I have to mentalize myself to work during the hot summer months.
by La reina dels guiris August 04, 2009
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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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mentally-challenged; retarded; needs psychologic help
that dude's mental because he fucked his own sister.
by mentallyyyy May 17, 2003
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