1 definition by ashleyhasa99mm

Top Definition
1. A massive gun that is eleven times bigger than a 9mm, owned only by pure gansters.
1. Whoa, diggity dawg! Did you see Ashley strut by with her 99 mm?

2. Oh noez, Kyle just got shot by a 99 mm!
by ashleyhasa99mm January 03, 2008
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Buy a 99 mm mug!