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Related Clues:
- Wordless authorization
- Shilling, informally
- Nomination
- Signal assent
- Signal ''yes'' with one's head
- Subtle acknowledgment
- Bobblehead's action
- Quiet assent
- Agree non-verbally
- Short haircut for an old shilling?
- Discreet auction bid
- Just smile and ___ (strategy while waiting for someone to stop mansplaining so you can smack them)
- Show agreement for number five hundred
- Assenting gesture
- Float up and down