吃饱了饭撑的
chī​bǎo​le​fàn​chēng​de

having nothing better to do

  1. 吃饱 吃飽 chī​bǎo verb + adjective
    to eat one's fill
    To eat until full; to have eaten enough.
  2. 了 le particle
    [aspect marker]
    Placed after a verb or adjective to indicate the completion of an action or a change in state.
  3. 饭 飯 fàn noun
    meal
    a meal; daily food
  4. 撑 撐 chēng
    to be stuffed
    to fill to the bursting point; to feel uncomfortably full from eating too much
  5. 的 de particle
    [nominalizer]
    Turns a word or phrase into a noun-like thing, meaning "the one that..." or "the kind that...".