Short for "Just so you know"
Jsyk, you dense piece of shit, you're gonna be in deep shit for stealing items from the managers office.
by Zicronium May 03, 2017

by jsyk, it's Ursula January 14, 2008

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.
or
JSYK, I checked on that thing about Phil Collins and the drowning, and it's totally an Urban Legend.
by IsaacN January 06, 2006

by Cockroach3409 July 13, 2009

by filiru2pny June 25, 2008

by Brian February 19, 2005

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.
or
JSYK, I checked on that thing about Phil Collins and the drowning, and it's totally an Urban Legend.
by Summer July 28, 2008
