What is the meaning of twiddle?

noun

• A series of small (usually idle) twists or turns.

verb

• Turn in a twisting or spinning motion.
  • usage: "The leaves swirled in the autumn wind"
  • synonyms: twirl, swirl, whirl
• Manipulate, as in a nervous or unconscious manner.
  • usage: "He twiddled his thumbs while waiting for the interview"
  • synonyms: fiddle with