1. what you say when you forget what to say; a hesitation

2. acronym for ur mom
1. Kelly: "The koala lives in Australia, um, they like to eat eucalyptus leaves.."

2. Paul: "I'm hungry!"
Josh: "um"
by Lily May 5, 2006
Get the um mug.
Um is the sound beginning Buddist(s) make while trying to meditate by copying a professional elderly person who doesn't um at all.
1: Uming will help you keep concentration!
2: But, you don't um!
1: Um, now.
by 1928 February 12, 2005
Get the um mug.
1.an expression having a discretionary undertone and is usually used in a state of confusion, or as an aid in connecting lies or other words into informal grammatical conversations; a word that assists in a person’s conversation.

2.usually used by tweakers to finish up their elaborate lies.
Man: Where did you buy those imac computers?

Tweaker: um, I was working for this guy....um.....and he hella hooked it up. All I did was ummmm...
by sonic559 July 23, 2010
Get the um mug.
A word one says when disturbed by pervertedness.
Simon: Ask dillon if he eats cum for breakfast.

Mackenzie: um
by mackenzierules December 5, 2006
Get the um mug.
See "Uh'm".

Synonym for "I'm".
"What Um 'bout to do right now is take that ass to da flo."
by Zor Prime November 25, 2003
Get the um mug.
Interjection of choice of the Ding. On a bad day fully 75% of what she has to say will consist of "um."
Ding: Um, did you see my book?

Clyde: What was it called?

Ding: Um, I don't remember. Um, bye!
by Krakky McKraken November 5, 2006
Get the um mug.