沐猴而冠

lit. a monkey wearing a hat (idiom) / fig. worthless person in imposing attire

and / as well as / and so / but (not) / yet (not) / (indicates causal relation) / (indicates change of state) / (indicates contrast)

monkey / CL:隻|只[zhi1]

surname Guan

hat / crown / crest / cap

to put on a hat / to be first / to dub

to bathe / to cleanse / to receive / to be given