Top definition
Acronym: shorthand for "Just So I Know", used in corporate emails. Similar in use to JSYK (Just So You Know), another way of saying FYI.
JSIK, I have 2 wks of vacation this year, right?
by Unkie Al May 23, 2006
Get the mug
Get a JSIK mug for your dad Trump.
buy the domain for your diy vlog