He is always trying to lick his boss's boots to get a promotion.
Он всегда пытается подлизываться к своему начальнику, чтобы получить повышение.
Definitionen
To behave in an excessively servile or obsequious manner toward someone, often by flattering or ingratiating oneself in order to gain favor or advantage; to act like a sycophant.
