v. & n.
--v.
1. tr. & (foll. by with etc.) intr. twirl, adjust, or play randomly or idly.
2 intr. move twirlingly.
--n.
1. an act of twiddling.
2 a twirled mark or sign.
Phrases and idioms:
twiddle one's thumbs
1. make them rotate round each other.
2 have nothing to do.
Derivatives:
twiddler n. twiddly adj.
Etymology: app. imit., after twirl, twist, and fiddle, piddle