It's short for "just kidding" but long for "JK."
Doctor: I'm sorry, but you've got SIDS
Patient: What?
Doctor: JUST K
by Mart Neyugn November 14, 2009
1) A group of indian pickpockets
2) A nip/tuck operation for super fat people

3) Japanese local slang term similar to munging
1) See that justks there? Such a skillful thief
2) Ouch that guy is huuuge he must need a justks-op
3) Lets go down to the graveyard and justks your gran
by Hermanthegerman July 04, 2009

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