brownie (someone)

Translations
подлизываться к (кому-то)
He tried to brownie his boss to get a promotion.
Он пытался подлизаться к своему начальнику, чтобы получить повышение.
Definitions
To 'brownie' someone is an informal slang term meaning to flatter, praise, or do favors for someone, often excessively or insincerely, in order to gain their approval or advantage; similar to 'brown-nosing.'