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USA slang
Seriously, genuinely, completely honest — New York's favourite way to say "I swear I'm not joking"
Safe to use?
Fine in casual settings; the spelling keeps it out of formal writing.
Tone
Blunt sincerity; grabs the listener by the shoulder.
Region
USA
Formality
Firmly informal — texts, speech, and captions.
Context Decoder
Check what it means in context, how it sounds and whether it is safe to use.
deadass means Seriously, genuinely, completely honest — New York's favourite way to say "I swear I'm not joking". It is best read as usa slang associated with USA.
"Deadass" turns any statement into sworn testimony. "I deadass fell asleep at my desk" insists on the literal truth of something hard to believe; "deadass?" asks "are you serious?"; and a bare "deadass" in reply confirms it — completely serious, no exaggeration. It occupies the same slot as "no cap" or "for real", with a distinctly New York accent.
The word's charm is its bluntness. Where "honestly" sounds polite and "genuinely" sounds like a LinkedIn post, deadass sounds like someone grabbing your shoulder. That energy made it a meme in its own right — tweets formatted "deadass thought..." narrate moments of genuine, embarrassing sincerity.
Despite the spelling, it is not really considered profane in casual use — it is closer to "dead serious" than to swearing — but it is firmly informal, and teachers and parents outside New York sometimes hear it as cruder than intended.
"I deadass waited forty minutes for a bus that wasn't coming."
"You're moving to Berlin?" "Deadass."
"She deadass finished the whole assignment the night before and got the top mark."
"Deadass thought the meeting was on Zoom and sat in an empty room."
"This is deadass the best bagel I've had outside New York."
Blunt sincerity; grabs the listener by the shoulder.
Fine in casual settings; the spelling keeps it out of formal writing.
Context-dependent
Dont joke around; be serious (implies severe consequences)
Seriously? Or truly/genuinely.
Seriously (playful variation of 'for real').
Profound; serious; emotionally deep or meaningful.
Stop messing around; dont be silly or play games (from Hokkien)
Serious conversation; being honest and direct.
"Deadass" is New York slang through and through, rooted in Black and Latino communities of the city and in wide use there since at least the 2000s. It builds "dead" (completely, as in dead serious) onto an intensifier. Social media, rap, and the meme era carried it far beyond the five boroughs, where it now works both as an adverb and as a one-word reply meaning "I'm serious" or "same, honestly".
Seriously or genuinely — it insists a statement is completely true. Alone as a reply, it means "I'm dead serious".
New York City — it is one of the most recognisable pieces of NYC slang, rooted in the city's Black and Latino communities and spread nationally by social media and rap.
Not really in practice — it functions like "dead serious" — but the spelling makes it too casual for school essays and workplaces, and some adults hear it as crude.
Both insist on truthfulness. "No cap" (Atlanta origin) tags a claim as no-lie; "deadass" (New York) is blunter and also works as a question or standalone confirmation.
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