look up any word, like cleveland steamer:
 
15.
Um
A word used by stupid people. You're even stupider if you type this word .

"Um uh um uuum uhh duh I'm a dumbass um um uh ."
A normal : "Hey man darth vader had a white costume right ?"
A stupid bitch : " um...."
A normal : " shut the fuck up bitch ."
by The guy banging your mom December 03, 2013
 
16.
um
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
 
17.
um
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 05, 2006
 
18.
um
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
 
19.
um
to concentrate deeply
"hold on, I'm umming!"
by Sexy "MILF" MacSexerson January 31, 2005
 
20.
um
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 05, 2006
 
21.
um
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