Two words: *polymath* (''Renaissance man'') and the other:
*Sprezzatura*: Learned Carelessness. : Does amazing thing: says,
''Ah, it was nothin'''.
''an easy facility in accomplishing difficult actions which
hides the conscious effort that went into them''.
*Sprezzatura* has also been described ''as a form of defensive
irony: the ability to disguise what one really desires, feels,
thinks, and means or intends behind a mask of apparent reticence
and nonchalance''.
The word has entered the English language; the Oxford English
Dictionary defines it as ''studied carelessness''