When, upon meeting someone, you dislike them, pull out your UMP, and blow everyone in the room's heads off.
by Big Hairy Pendelum June 14, 2010
Get the First UMPressionmug. Get the First UMPressionmug. Get the First UMPressionmug. Get the First UMPressionmug. We'll email you a link to sign in instantly.