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2.
LTK
A false statement made in hopes of gaining acceptance from an admired person or group. Stands for "Lie To Kick it."
Jim: I'm really good at snowboarding.
John: I've seen you and you aren't.
Tim: Don't LTK Jim. We're your friends.
by Andraleah April 11, 2008
 
1.
LTK
"License to Kill"

Used to describe a round in GoldenEye: Source where every shot is a one-shot-kill regardless of where the shot is taken.
"DUDE I SAW BLOOD SPLATTER AND WE'RE ON LTK!!!! HOW THE F*@$ ARE YOU STILL ALIVE"

"stop being a noob fag"
by PWNeddds April 29, 2010
 
3.
ltk
Lunch Time Kids!

From Adam Sandler's famous skit about Momma asking the kids jiggle their balls. Used in chat rooms to indicate a lunch break
"Hey - I'll jump on that bugfix, but first ltk."
by Rog Lewis March 20, 2008