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1.
an abbreviation for : just so u know
"i have a shitload of stuff to do tommorow jsuk"
by sarena April 28, 2006
 
2.
an abbreviation for "just so u know," used whenever instant messaging something matter-of-factly

sometimes used as a synonym for the abbreviation fyi (for your information)
Dan: i love that movie!
Serena: u stillll havent returned that copy i lent u...jsuk.

Jsuk, dont worry cuz we arent the only ones who forgot our essays.
by Spammie December 11, 2007
 
3.
The acronym for the term 'Just So You Know'.
Guest: "I'm eating humans, jsuk."
Anon: "Okay, thx for telling me."
by AkiGrahamShitatsuchi December 26, 2009