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1.
ul
ul = unlucky taken from MMORPG's usually with the ability to kill other players. Will be said by the killer.
*player dies*
l337pker: ul!
by Epitaph December 27, 2004
 
2.
UL
Ul stands for upload, as aposed to DL for download.

Originates from way back in the BBS years, when giving something back for ratio on said said server.
"I'll UL that file for ya m8 it'll be there in a sec."
by Julia Rosendahl June 10, 2008
 
3.
ul
Acronym for Uncontrollable laughter.
Created by stonemansrs.
Stone: ul
Doob: wtf does ul Stone XD
Stone: uncontrollable laughter...I made it up.
by Stonemansrs November 16, 2010
 
4.
UL
Ultra-Left
I love going UL on homework assignments. Really makes school interesting and not boring as shit
by decentralism November 08, 2011
 
5.
UL
Abbreviation for Unrequited Love
Man: What's up? Why do you look so sad?
Woman: Because I'm feeling UL with someone
Man: That sucks
by ano-ymous August 16, 2008
 
6.
ul
Underwriters Laboratories, Inc. You see their logo all over the house (assuming you live in America and have electricity). They help you make sure you choose safe electric-powered stuff.
My laptop has a UL in a circle under it.
by GWR Definition Agency January 01, 2005
 
7.
ul
Net abbreviation for "U Loser".

See also FU
Lost again eh! UL!
by Bruce Lee April 04, 2003