Creepy-ass is an American intensified compound adjective meaning very creepy or deeply unsettling. The '-ass' intensifier is a common feature of informal American English, attaching to adjectives to amplify them (cf. 'crazy-ass,' 'sketchy-ass,' 'fancy-ass'). It doesn't add a literal meaning; it's purely emphatic, giving 'creepy' extra force. The register is casual and vulgar; fine for informal speech and writing but inappropriate in formal contexts. Works best when describing something genuinely unsettling rather than just mildly odd.
There was a creepy-ass clown in the window of the abandoned house and nobody wanted to walk past it.
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(slang, vulgar) Very creepy.
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Regional slang from around the English-speaking world — British, Australian, Irish, Caribbean, Nigerian, Filipino, AAVE, and the hyphenated-English dialects that make the internet sound local.
See all Regional & Other slang on Slangora.