equivalent to saying: for real; im serious; telling the truth.
peep 1: you robbed his bike? ...naahhh..
peep 2:im dead ass.
by chimpy August 28, 2004
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deadass means you serious like you not playin around .
corey: bruh imma deadass slap tf outta you

james: you ain finna do shitt
by jhittt85 May 22, 2020
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A slang for serious to be used in any scenario;
"hey, did you hear my boy deadass clapped them cheeks at the party last night?"
by CloutBoiDeadassB September 10, 2017
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Completely serious.
"Yo, I hooked up with Rebecca last night!"
"No way!"
"I'm deadass."
by AGentlyUsedCondom October 22, 2015
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A term used by timbs wearin ass Brooklyn niggas that means serious.
by Deadasseriousb December 3, 2016
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one person is being so serious, they're not even playing around or joking with you
Mike- " I'm about to drop out because I hate school."
Janel- " Boy, you'll get through it, you'll be fine."
Mike- " Nah, I'm deadass."
by anothergalfromdahood April 28, 2018
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