quirk

ot noun

1. 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.
2. An acute angle dividing a molding; a groove that runs lengthwise between the upper part of a moulding and a soffit
3. A quibble, evasion, or subterfuge.

fe’l verb

1. To move with a wry jerk. He quirked an eyebrow.
2. To furnish with a quirk or channel.
3. To use verbal tricks or quibbles