nas

Acronym medical: No Ass Syndrome

Definition:
The buttocks (The two fleshy parts of the body posterior to the hip joints) appear to blend into the posterior muscles in the leg, resulting in comments such as "no ass" or "flat ass"
dude1: hey, she's got a severe case of NAS
dude2: yea shit
dude1: i'd still hit it
dude2: yea with a fucking nailed bat

by rnc234234fj09 October 09, 2007
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