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Acronym for OldSchool RuneScape; an older version, circa 2007, of the MMORPG "RuneScape."
RuneScape 3 player: I miss the older version of RuneScape
OldSchool RuneScape player: Then why don't you play OSRS?
RuneScape 3 player: Wait...That's a thing? *logs off and makes OSRS account*
by AmusedJake January 29, 2017
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2
Quick way to write or say: On Some Real Shit

Good for texting, or just updating your status on many social networks, such as: Myspace, Facebook, Twitter and others.
You: Man im sick and tired of my job, OSRS!!!!!
by who_cares1993 June 18, 2009
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n. A dirty whore who practices her craft on internet messagboards.
OSR is a fucking cunt.
by effthreetus December 08, 2004
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On Some Real Shit? When people tell you they will give you something for free you say "OSRS?" aka "fr?"
"Wait are you OSRS when you say I can come over?"
by Babygirl7355 November 20, 2017
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