pí fú hàn shù
lit. an ant trying to shake a tree
to overrate oneself (idiom)
hàn shù pí fú
lit. an ant trying to shake a tree
to overrate oneself (idiom)
pí fú hàn dà shù
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]