Related Clues:
- Says yes with one's head
- Signals in charades
- Signaled yeses
- Acknowledges silently
- They can mean 'yes'
- Signs agreement without senior detective
- Non-verbal indications of assent
- Approving bobs
- Subtle auction bids
- Moves of agreement
- Audition acceptances
- Headbanger does this during slow jams, perhaps
- Award nominations, slang
- Nonverbal audition responses
- Gives silent approval