Related Clues:
- If you think a person is a jerk, it might be because of this
- A convulsive muscular twitch
- The first 'O' of O-O-O
- Twitch seen regularly
- Involuntary convulsion
- Irregular movement with sign of approval reportedly
- Hearing blood-sucking arachnid, it might be nervous
- Idiosyncratic behavior
- Twitch at odd points?
- Nervous symptom
- Facial twitch, say
- Rapid blinking, for one
- Muscle fit
- ___ Tac (mint)
- Start of X-X-X