mooch off
Upper Intermediate (B2)informal
Get things like food or money from someone for free without giving anything back.
"He's been mooching off his parents for years — it's time he found a job."
Hear it in context

Human Lie Detector: The #1 Sign They’re Lying To You, Catch Liars Instantly! | Dr Leanne ten Brinke
The Diary Of A CEO · 23:17
kind of mooch off of a family members or a romantic partner.

‘The Big Bang Theory’ but It’s All About the Comic Book Store
The Big Bang Theory · 1:06
Then I could run a failed comic shop and mooch off some guy's mother.