Green’s Dictionary of Slang

ass-kissing adj.

also butt-kissing, rectum-kissing
[ass-kiss v.]

(orig. US) sycophantic, toadying, begging, supplicatory.

[US]T. Berger Crazy in Berlin 186: A creepy little rectum-kissing rabbit.
[US]L. Hansberry Sign in Sidney Brustein’s Window in Three Negro Plays (1969) I i: Wear a tie and your best Establishment Ass-kissing Manner.
[US]B. Malamud Tenants (1972) 75: I don’t want to turn into a halfass white writer or an ass-kissing Neegro who imitates ofays.
[US](con. 1949) J.G. Dunne True Confessions (1979) 28: An ass-kissing clerk, Fuqua. Just the qualifications for chief of homicide.
[US]H. Gould Fort Apache, The Bronx 271: Asskissing peasants who could be bought for a drink.
[US]P. Beatty White Boy Shuffle 5: An ass-kissing sell-out house Negro.
[UK](con. 1979–80) A. Wheatle Brixton Rock (2004) 211: An ‘I’m better than you’ vibe, similar to them teacher-arse-kissing prefects at school.
[UK]Indep. Rev. 7 July 4: Butt-kissing Naifs at Belmarsh Prison’s ‘Education Department’ have been reversed by their superiors over their misguided attempts to make Jonathan Aitken a prison librarian ‘redband’.
[US]G.V. Higgins At End of Day (2001) 182: That’s what you think I am, Todd? [...] An ass-kissing apprentice hood?