sponging off one's parents; living off one's parents
Idiomatic expression describing an adult who relies on their parents for financial support without contributing, often with a negative connotation.
He is still sponging off his parents even though he's thirty.
I want to stop living off my parents.
Refers to someone not in education, employment, or training; may overlap with 親のすねかじり but focuses on work/study status rather than the act of depending on parents.
Standard kana-mixed spelling; the most common written form.
Kanji spelling using 臑 (shin) and 噛り (biting); rarely used and may be unfamiliar to many readers.
Literally 'gnawing at one's parent's shin'; the image is of a child clinging to and biting a parent's leg, metaphorically living off them. The exact origin is uncertain, but it is a well-established idiom.