sponge on (someone)

Translations
жить за счет (кого-то)
She was accused of sponging on her boyfriend.
Ее обвинили в том, что она живет за счет своего парня.
Definitions
To habitually rely on someone else for money, food, or other support without giving anything in return; to take advantage of another person's generosity.
Words
sponge

verb
паразитировать
on

preposition
за счёт
someone

pronoun
кого-либо