ul = unlucky taken from MMORPG's usually with the ability to kill other players. Will be said by the killer.

A stupid person; it refers to the lack of surface area on an individual's brain. The general thought is that the more surface area (wrinkles, creases, etc.) a brain has, the smarter the person is. Conversely, a person with a smooth brain (no wrinkles) has less surface area and would therefore be stupid.

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.

Acronym for Uncontrollable laughter.
Created by stonemansrs.

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.

Ultra-Left

Net abbreviation for "U Loser".

See also FU