Look up: 

Someone looked this up in an attempt to see if anytone was smarter than them by already adding it.

Shit nigga, I'm one of them people.

Look up: by Advil April 7, 2004

Look up: 

how has no one thought of that yet? man i'm cool.

papa smurf?

Look up: by Bwian Boyke March 28, 2003

Look up: 

To read or learn about in a dictionary, encyclopedia, or other source of information.

The teacher asked me to look up Spongebob in the dictionary but I couldn't find it.

Look up: by yatpay July 12, 2004

Look up: 

Errrrm....I dunno.

You looked up: look up: looki up: look up:.

Look up: by person yo-yo July 24, 2003

look up 

Verb:
1)Somthing you look up in Urban Dictionary when your uncreative brain isn't able to figure out a better definition to look up. As "look up" is written next to the look-up-box.
2) Something you did a few seconds ago,of course after giving this definition a thumb up.

antonym: look down

"I just looked up the term "look up"

look up by i_cant_make_up_a_funny_pseudym December 23, 2008

look up 

To search online, in a book, magazine, dictionary, encyclopedia, other writing work, for an answer or other need

I will look up this fucking word now:
Strong Bad

look up by monkeyGODS July 26, 2003

Look up 

What it usualy says before a search box on a dictionary website (on the other side from the search button)

look up and you'll see "Look up" i.e., it's at teh top of this page...

Look up by NIK January 19, 2004