Top definition
When, upon meeting someone, you dislike them, pull out your UMP, and blow everyone in the room's heads off.
I met some douches at the pub last night, so I gave them a memorable first UMPression.
by Big Hairy Pendelum June 12, 2010
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Cleveland Steamer Plush

The vengeful act of crapping on a lover's chest while they sleep.

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