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They're so loud. Typically used to describe large groups of shrieking girls, bothering the general public.
Ben: Hey those girls don't know how to be quiet do they?

Tom: Yeah, TSL!
by Glyca October 24, 2012
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3
TSL stands for The Sith Lords, the sequel to the very popular star wars game "Knights of the Old Republic"

see also KOTOR
I played KOTOR: TSL yesterday.
by random?dude? May 08, 2006
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Titty Sucking Lips

Like DSL's, but on straight men. Celebrities with big, full titty sucking lips include Channing Tatum and Mick Jagger.
Girl: check out that guy sitting there, he's hot and has nice lips.
Friend: Hahah those are some DSLs

Girl: Nah they're TSLs. I want them nibbling on my nipples right here, right now, on the dance floor.
by Mer's Pet June 06, 2016
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5
An acronym for the band The Starting Line.
Originating in Pennsylvania they've released two albums to date, the amazingly successful Say it Like You Mean it and the less known but still awesome, Based on a True Story.
holy shit that new song by TSL is sick!
by musiclvr November 27, 2006
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Stands for Totally Stifling Laughter. For all those times you get a funny text, read a hilarious e-mail, or receive a joke over IM while at work (or another place deemed inappropriate to laugh out loud).
"Oh man, I'm TSL because my boss just walked by!"
by greenmoose July 28, 2009
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