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fat-assed
1. rude slang Describing someone who has a large buttocks. What? I think that fat-assed chick is super sexy.
2. offensive slang Describing someone who is fat or obese. You can't have a skinny guy play Santa—you need a fat-assed dude for that.
fat-ass(ed)
mod. having large buttocks. (Usually objectionable.) Get your fat-ass self outa my car!