Top Definition
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.
#fyi #for your information #common phrases #chat language #jsyk #just so you know #common chat language
by IsaacN January 05, 2006
"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.
#fyi #crs #ik #txt spk #just so you know
by jsyk, it's Ursula January 07, 2008
Just So You Know
Guy: Hey dude jsyk, i banged your girl last night.
#chat #instant #messeging #jsyk #acronym #just #so #you #know
by filiru2pny July 10, 2008
Internet lazy phrase: "Just so you know..." Simply invented to save keystrokes.
jsyk, i rarely stay up past midnight.
by Brian February 19, 2005
is an acronym for the phrase "Just so you know"
JSYK, this martini is delicious
#fyi #lol #rofl #411 #for your information
by Cockroach3409 July 13, 2009
acronym for:

Just so you know
btw, that dick picture i sent you is a bit old, i have pubes again jsyk
#jsyk #just #so #you #know
by lobodomy420 January 21, 2014
Just So Ya Know
I love you JSYK
#just #so #ya #know #love #me
by EddyWayne October 18, 2011
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