屁股沉

pìguchén ㄆㄧˋ ˙ㄍㄨ ㄔㄣˊ

    • to sit for ages and overstay one's welcome

Character by character

Saying俗语俗語

Idiom惯用语 · Widely known

May offend: vulgar language

Literally
a heavy backside
Meaning
Said of a guest who sits for a long time and doesn't leave. Colloquial and mildly mocking.

Sources