Top definition
Having strength or power.

Power, Strength, Energy, Might, Force, Potency, Ability, Excite
The car doesn't have enough umpf to get up the steep hill.
by Grrr123 December 19, 2005
Happy St. Patties Day!
A statement made when you are bored/annoyed about something, similar to a sigh but way more intense.
Guy1: Are you going to Matt's house later on?
Guy2: No! I am stuck here with those homeworks, umpf!
by dttah March 27, 2011
Happy St. Patties Day!
The sound a wretched whore makes after a swift strike to the vagina.
" Bitch! Where's my money?? ((kick at the uterus)) UMPF!!!"
by arbutifuls March 30, 2009
Happy St. Patties Day!