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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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4
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 October 08, 2017
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5
"Deadass" is a word primarily used by teens, or New Yorkers who have a Timberland obsession, and usually spend their time in Brooklyn or the Bronx, this word means "seriously" or "for real" to any other American.
Angry Yankees fan 1-"I just got my new timbs dirty"
Angry Yankees fan 2-"Deadass?"
Angry Yankees fan 1-"Deadass B"
via giphy
by Noob_scoop69 January 14, 2017
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7
Completely serious.
"Yo, I hooked up with Rebecca last night!"
"No way!"
"I'm deadass."
by AGentlyUsedCondom December 16, 2015
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