Similar words: Pigs might fly, outflow, outflank, hot flash, salt flat, heat flow, first floor, direct flight. Meaning: v. fire as from a gun.
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1. A word spoken is an arrow let fly. 
2. They let fly a shower of arrows.
3. She let fly with a stream of abuse.
4. He let fly at me with his fist.
5. The prisoner let fly with a torrent of abuse.
6. The soldiers let fly with a hail of machine-gun fire.
7. Furious at his deceit,[http://sentencedict.com/let fly.html] she let fly at him with a stream of abuse.
8. The Bashers tightened lips, hunched shoulders, and let fly.
9. Kimberley let fly at the dangling men from a hopeless range.
10. If the threat still persists(sentencedict.com), he will let fly with one or both hindlegs.
11. It seems that the Battler and Rico let fly at somebody who was coming out of the back door of the Regal Arms.
12. He let fly a torrent of abuse.
13. People can let fly their thoughts.
14. I learned is you let fly, my mother!
15. A word speak is an arrow let fly.
16. The angry man let fly a volley of oaths.
17. When he called her stupid she really let fly at him.
18. He aimed carefully and then let fly at the ducks.
19. He aimed carefully and then let fly , ie fired.
20. He picked up a stone and let fly at the balking dog.
21. Jon filled his fist with a pillow and let fly , but the bird took to air.
22. He aimed carefully and then let fly at the birds.
23. Sit it on a hill and wait till the enemy is within half range and then let fly.
24. He located running back John Fuqua 20 yards downfield and let fly.
25. You have only to come close enough to my hide and I let fly.
26. In his mind , the white bird rose in flight and its wings let fly one feather.
More similar words: Pigs might fly, outflow, outflank, hot flash, salt flat, heat flow, first floor, direct flight, fretful, set forth, set free, pet food, forgetful, budget for, fretfully, set foot on, set foot in, pocketful, bucketful, regretful, set fire to, forgetfulness, scarlet fever, picket fence, market forces, regretfully, money market fund, fly, fly out, mayfly.