Top definition
"Just so you know." Excellent for text messaging, MySpace and most importantly, daily dialogue.
Kate: Jsyk, you've gotten fatter over these holidays.
Steph: I eat my feelings okay.
by jsyk, it's Ursula January 07, 2008
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2
The "new" FYI. FYI is old school. JSYK (Just So You Know) is a more casual, friendly means of giving your friends and colleagues semi-useful information.
JSYK, it wasn't Roy, it was Isaac.

or

JSYK, I checked on that thing about Phil Collins and the drowning, and it's totally an Urban Legend.
by IsaacN January 05, 2006
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5
JSYK is an abbreviation. It stands for "Just So You Know". It is not used commonly, but it saves time from typing it all out.
JSYK, I'm not going to Herman's party.
by Shy_Ghost_178 November 10, 2020
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6
Internet lazy phrase: "Just so you know..." Simply invented to save keystrokes.
jsyk, i rarely stay up past midnight.
by Brian February 19, 2005
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7
The "new" FYI. FYI is old school. JSYK (Just So You Know) is a more casual, friendly means of giving your friends and colleagues semi-useful information.
JSYK, it wasn't Roy, it was Isaac.

or

JSYK, I checked on that thing about Phil Collins and the drowning, and it's totally an Urban Legend.
by Summer January 04, 2006
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Get the JSYK neck gaiter and mug.

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