Related Clues:
- Muzzle or silence
- Muffle with slang joke
- Kind of muzzle or informal joke
- Put a muzzle on the joke
- Muzzle in palindrome form
- Joke or muffler - a palindrome
- Silence the joke
- Either way, that'll stop you giving 25 down
- It's so funny it leaves one speechless
- That's a funny sort of conversation-stopper
- The joke is it's such a conversation-stopper
- Funny how either way it puts an end to conversation
- Funny sort of way to stop talking
- The sort of joke that's a conversation-stopper
- Either way, a conversation-stopper