Related Clues:
- What makes an amp damp?
- Subpar mark
- Passing grade that won't please parents
- A number (not quite 10) held in vulgar shelter
- It's usually barely passing
- Inferior mark
- Ruby in the movies
- Not a good mark
- Near-failing mark
- "What's Happening!!" daughter
- Babe Ruth mark broken by Roger Maris
- Twisted Sister frontman Snider
- 'It's Always Sunny in Philadelphia' role
- "It's Always Sunny in Philadelphia" role
- Base of the Babylonian number system