Related Clues:
- "Boo" accompaniment
- Christmas-song verb
- Punster's reward
- What a lame joke might elicit
- Be a sore loser, in a way
- Spectral cry
- Make a sad face
- Partner of 20-Across
- "Eek!" elicitor
- Asp's greeting
- "Boo" follower
- React to an umpire's bad call
- Cry of disapproval
- [I can't believe you just stepped on my tail. Now back the fuck away.]
- Snake's noise