Green’s Dictionary of Slang

later for phr.

(orig. US) a general phr. of dismissal, synon. with to hell with; usu. later for that.

1953		Ella Fitzgerald ‘Later’ 🎵 Later for the happenings, baby.
1962		P. Crump Burn, Killer, Burn! 291: Listen, later for all this.
1975		E. Torres Carlito’s Way 62: Last words. Later for Matanzas.
1980		E. Folb Runnin’ Down Some Lines 77: If you can’t confront with the world outside, you can’t say you schooled. Later on fo’ it.
1997		C. Newland Scholar 120: Garvey? Later on star. I wouldn’t make him do dat, dat’s sick.
2002		Pink Fairies ‘Death in the Guitarfternoon’ on MercuryMoon.co.uk 🌐 ‘Meatman’ was a one-take-that’ll-do job, and we all liked it a lot. Who are ‘we’ I hear you ask, well, for a whole buncha reasons, later for that, ’kay?

In phrases

later for you (also later for your daddy)

(US) goodbye.

1954		Hepster’s Dict. 6: Later for your daddy – See you later.
1961		L. Block Diet of Treacle (2008) 101: Basil won’t wait. The world won’t wait [...] Later for all of you.
1983		Eble Campus Sl. Mar. 4: later for you – an expression of farewell.

In exclamations

later for you!

(orig. US black) shut up! go away! to hell with it!

1967		P. Thomas Down These Mean Streets (1970) 111: I whispered to the broad that was grinding against me, ‘Later for you,’ and walked over to the kitchen, ‘cool’ like I was supposed to.
1978		H. Selby Jr Requiem for a Dream (1987) 127: I hope you take the hunt, and she chuckled. Later for you.