QUIRK

noun

1. An idiosyncrasy; a slight glitch, mannerism; something unusual about the manner or style of something or someone
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.

verb

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