| drop the ball(expression, idiom, slip, stumble, flop) |
| err(fall, fail, blow, slip, blunder) |
| exhaust(verb, break, drop, fail, collapse) |
| faint(verb, break, drop, fail, collapse) |
| fall apart(verb, expression, phrasal verb, break, drop) |
| fall by(verb, expression, phrasal verb, hit, see) |
| fall off |
| fall over(verb, expression, phrasal verb, trip, collapse) |
| falling |
| falling down(verb, expression, fight, blunder, fumble) |
| fizzle out |
| flag(verb, break, drop, fail, collapse) |
| flake out(verb, expression, phrasal verb, break, drop) |
| flub(fail, blow, slip, spoil, blunder) |
| flummox(trip, slip, struggle, stumble, labor) |
| fold(verb, break, drop, fail, collapse) |
| foul up(expression, fail, blow, stumble, flop) |
| freefall |
| fumble(fail, blow, blunder, stumble, flop) |
| give(verb, break, drop, fail, collapse) |