First attested in the 1540s. Of uncertain origin.
quirk (plural quirks)
- an idiosyncrasy; a slight glitch, mannerism; something unusual about the manner or style of something or someone
- The car steers cleanly, but the gearshift has a few quirks.
- (architecture) An acute angle dividing a molding; a groove that runs lengthwise between the upper part of a moulding and a soffit
- (archaic) A quibble, evasion, or subterfuge.