Green’s Dictionary of Slang

buttlick n.

[butt n.1 (1a) + SE lick]
(US campus)

1. a fool.

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[US]P. Munro Sl. U. 52: That police officer is such a buttlick.

2. (also butt-licker) a toady.

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[US] P. Munro Sl. U.
[US]S. King Finders Keepers (2016) 229: The senator has agreed to stay another hour and answer their questions [...] and the hands of the butt-lickers and grade-grubbers [...] shoot up immediately.