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internet term, stands for "you lying sack of shit"
guy1: did you have sex yet?
guy2: yeah
guy1: o'rLy?
guy2: hahahaha no
guy1: YLSOS
by milFRO September 28, 2006
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"Why so serious?"

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Made famous by Heath Ledger as The Joker in the recent film, "The Dark Knight."
"I'm dying, my ex-girlfriend gave me the AIDS."

"ysosrs? :D"
by Jakuro October 7, 2008
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Related Words
YLSOS ysosrs YTSOS ylmost ylss

YTSOS

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you the son of shit
YTSOS, shut up!
by Lisa Bet February 27, 2015
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Someone who can’t talk about there feeling and lives under a rock; always need advice;
Jenny is so ylss
by That!d!ot@ngie June 19, 2021
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ylmost

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most greatly firstest, the most knownly firstest, the most known
ylmost
by imakeweirddefinitions February 25, 2023
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