前俯后仰 (前俯後仰) qián fǔ hòu yǎng

qián fǔ hòu yǎng set phrase to rock one's body backward and forward; to be convulsed (with laughter etc)
Domain: Modern Chinese 现代汉语 , Subdomain: , Concept:
Notes: (CC-CEDICT '前俯後仰')