jiā​xī​zhuì​yuān

to be fickle in one's affections

加膝坠渊 加膝墜淵 jiā​xī​zhuì​yuān
to be fickle in one's affections
Literally meaning to hold someone on one's knees when liked and push them into an abyss when disliked; used to describe a person who is fickle or inconsistent in their love and hate, or who appoints and dismisses people based on personal whim.

Cross-References

Variant of