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A lazy person. Derived from the word "slug", the detraction of the letter 'g' is to denote laziness to the point of not using the last letter.

Casually lazy, procrastinating.
"Aw man, you're such a slu."

"No time to be a slu, you have a test to study for"
Slu by Sluka July 7, 2004
Related Words
slut slug slunt slump Slurpee slurp slutmuffin Slunk Slugging slush
The act of giving or recieving oral sex.
Man, I got so much Slu last night!
Slu by Yulonda March 27, 2009
SLU: Single-Letter URL

When you can type a single letter into your address bar and hit Enter and your browser knows what website to take you go.
My SLUs G and N take me to Google and Netflix.
SLU by LoganDark August 7, 2018
A combination of a slut and a hoe. Willing to cheat on their s/o, but hesitant to do so.
"Damn she wants to kiss Johnny but shes already dating Ben, what a slu"
Slu by Jdoggo21 December 12, 2018
Alabama Slang: An inlet on the lake.
The Coosa Queen was sailing yonder on the slu.
Slu by xowe March 31, 2019
A nickname for someone that is Slow Lazy & Useless.
Me: Hey SLU!
Him: My name is Austin…
Me: Shut up SLU you piece of shit.
SLU by D. Carleton January 22, 2025