A prominent phrase said by Swiper the Fox in almost every episode of the hit cartoon "Dora the Explorer". He steals the goods from Dora and Boots and says this.
Heh, heh, heh. You're toooo late, you'll never find your backpack now. {He then throws the backpack into bushes, then runs the opposite direction. I wonder what his motive is, I mean come on. And same thing with the grumpy old troll, who lives under the bridge.
Although a freindly parting salutation, this has it's roots planted firmly from the 70's pop culture of under-aged, underground consumption of marijuana and alchohol. This basically means: I have been talking for the last 5 minutes, and now realize that you are not only high, but not capable of understanding simple conversation, which, at this point, we can have at a later time, when you are not in such a state.
Hey bill, did you see that Kiss tickets go on sale on the 5th"Later When You're Straighter", dude!