Ψάξε όποια λέξη θες, όπως b4nny:
 
1.
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.
από Big Hairy Pendelum 12 Ιούνιος 2010