ump45 

the most overused overpowered weapon in mw2

why does everyone use that whoreish ump45 on this game?

ump45 by connor tha beast July 22, 2010

UMP45 

A weapon used in Modern Warfare 2. This weapon is commonly used with a silencer. With a high fire rate, high damage, and high mobility, this gun is overused and overpowered. This weapon is frowned upon in online matches.

I hate this n00b using the UMP45. Annoying as hell...

UMP45 by MW2 Freak January 5, 2011