sersem kimse

listen to the pronunciation of sersem kimse
Türkçe - İngilizce
nincompoop
A silly or foolish person

No wonder that Chauvelin's spies had failed to detect, in the apparently brainless nincompoop, the man whose reckless daring and resourceful ingenuity had baffled the keenest French spies.

{n} a blockhead, simpleton, fool
a stupid foolish person
A fool; a silly or stupid person
a stupid person (ninny + nicompoop (1600-1700))
{i} idiot; simpleton (Slang)
sersem kimse