Top Definition
An acne mustache; having acne on one's upper lip.
Guy: Have you kissed Jessica yet?
Boyfriend: Hell no... Have you seen her ack stash?
Guy: Oh... Gross.
by Jaja A January 10, 2009
Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×