蚍蜉撼樹 [－－－树]

Jyutping pei4 fau4 ham6 syu6
Pinyin pí fú hàn shù

Definitions (CC-CEDICT)
  1. lit. an ant trying to shake a tree
  2. to overrate oneself (idiom)
Definitions (粵典–words.hk)
  1. 語句
    不自量力
    to overrate or overestimate one's own abilities; literally: an ant trying to shake a big tree
  2. 近義詞
    螳臂擋車
Definitions (Wiktionary)
  1. phrase, idiomatic
    to ridiculously overrate oneself; to be self-important
    (syn.) 蚍蜉撼大树, 蚍蜉撼大樹