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
by i_cant_make_up_a_funny_pseudym December 23, 2008
Get the look up mug.
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
by monkeyGODS July 27, 2003
Get the look up mug.
to look up as in to look into the sky retard.
y dont u look up u son of a bitchu can also LOOK taht word UP.
by look up February 1, 2005
Get the look up mug.