An ass so narrow and skinny it resembles the threaded end of a needle. Characterized by the complete absence of butt cheeks, said persons bunghole looks like a cats with their tail up and makes only slight whistle noises when farting.
Can be caused by Noacetol
disease, or having a diet consisting solely of pizza bites and mountain dew. Deliberate needle ass conditions can be brought on by the Crack-ho-skinny diet.
Brooke's needle ass made it look like she had a camel toe in the back.