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1.
just laugh, just chill

This abbreviation is used when someone is overreacting to something that's not a big deal, and they just need to relax and laugh about it.

Can also be used to mean "just laughin, just chillin" to describe what you're doing
Y: OMG WHY WOULD YOU POST THAT PICTURE?!?!?!
E: jljc, erryone thought it was hilarious.

or
E: what are you doing? where did you go?
Y: jljc
by slatez January 17, 2011