to extract sunbeams from cucumbers ● to milk a he-goat into a sieve ● to milk the bull / the ram. to separate the milk ● to skim the cream from the milk ● to cream. to put in one's oar / spoke. to thrust oneself forward ● aprox. to meddle / to interfere in smb.'s affairs. to make milk into butter. to dress a fruit-tree with limewash. to shed one's teeth. a scalded cat / dog fears cold water ● once bit(ten) twice shy ● a / the burnt child dreads the fire. (it is) better to do well than to say well. fig. pigeon('s) milk. the milk has turned sour / has curdled. the never-never land ● the land flowing with milk and honey ● the land of Cockaigne / Cockayne.