deadass adjective 3adverb 2noun 1forms 3 adjective3 •Having very little activity; dead.On my way back to town I get to thinking about what Sandee said about Kirby: 'Fix the bastard'. Hmm...maybe we should. After all, what else is there to do on a Friday night in our deadass town? — 2000 •Dead serious.You need to quit talking about my mama. I'm deadass. •Genuine; real. Used as a negative intensifier.He bellowed at us, yelling that he was fucked if he was going to let a group of dead-ass wankers spoil his time off. — 1989 adverb2 •Really; seriously; actually.I was deadass starving. •Directly; dead on. noun1 •(US, slang) A lazy or unenergetic person.[…] us women know which man has got the spring and who and which is the unfortunate dead ass […] — 1967 formsdeadasses · more deadass · most deadass