The colloquial see you later, alligator, which originated in American English, is a catchphrase used on parting. The expected response is after while, crocodile.
 
Or you could say...
 
Chop-chop, lollipop
Bye-bye, french fry
Time to squirm, wiggle worm
So long, King Kong
Lets scat, alley cat
Know what I mean, jelly bean
Not too soon, baboon
Be sweet, Parakeet
Hit the trail, little snail
Time to shake, rattlesnake
 
Any of the above would work.
 
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