Related Clues:
- Boot on a diamond
- Foul-up on a pop-up
- Unpopped cracker
- Dropped fly ball, e.g.
- Drop of a swatted fly, e.g.
- Miscalculation
- Misplay, say
- It doesn't end with a bang
- Calculator message
- Word on computer screens, sometimes
- Baseball goof
- What computers repeat out loud while shooting sparks, in old sci-fi movies
- Mess (up)
- Careless mistake
- 1 + 1 = 3, for example