twiddle

Noun

• a series of small (usually idle) twists or turns

Verb

• manipulate, as in a nervous or unconscious manner
  • He twiddled his thumbs while waiting for the interview
    

• turn in a twisting or spinning motion
  • The leaves swirled in the autumn wind
    

Related words

• Synonyms: 
  fiddle with , twirl , swirl , whirl