Yanamino蚍蜉撼大树
pí fú hàn dà shùpifuhandashu
- lit. an ant trying to shake a big tree (idiom)
- fig. to overrate one's own strength
- also written 蚍蜉撼樹|蚍蜉撼树[pi2 fu2 han4 shu4]
Data from JMdict, KANJIDIC2 (EDRDG), KanjiVG, CC-CEDICT and Make Me a Hanzi. Sources and licences