see you later alligator
Definition from Wiktionary, the free dictionary
From the song See You Later Alligator.
- (slang) au revoir, see you soon
1955, Judson Jerome, Nolan Miller, New Campus Writings:
- Didn't know you were sick, Whitey, thought you were like […] some of the other times. From the top stair, See you later, alligator.