猴跳圈

hóutiàoquān ㄏㄡˊ ㄊㄧㄠˋ ㄑㄩㄢ

    • unreliable person who keeps changing

Character by character

Saying俗语俗語

Idiom惯用语 · Rarely used now

Literally
a monkey jumping through a hoop
Meaning
Describes someone who keeps changing and cannot be relied on.

Sources