LICK SOMEONE'S BOOTS (OR VULGAR SLANG ARSE)
Meaning of LICK SOMEONE'S BOOTS (OR VULGAR SLANG ARSE) in English
lick someone's boots ( or vulgar slang arse)
be excessively obsequious towards someone.
→ lick
Concise Oxford English vocab.
Сжатый оксфордский словарь английского языка.
2004