势成骑虎 shì chéng qí hǔ

DEFINITIONS

  1. if you ride a tiger, it's hard to get off (idiom); fig. impossible to stop halfway

CHARACTERS

势 shì power, force; tendency
成 chéng completed, finished, fixed
骑 qí ride horseback; mount; cavalry
虎 hǔ tiger; brave, fierce; surname