前俯後仰

Simplified: 前俯后仰

qiánfǔhòuyǎng ㄑㄧㄢˊ ㄈㄨˇ ㄏㄡˋ ㄧㄤˇ

    • to rock one's body backward and forward
    • to be convulsed (with laughter etc)

Character by character

Sources