Word Study
let fly
THESAURUS
let fly
bowl, cast, catapult, charge, chuck, chunk, cock, dart, dash, detonate, discharge, drop, eject, fell, fire, fire off, fling, flip, fork, gun, gun for, heave, hit, hurl, hurtle, jerk, lance, launch, let off, load, lob, pass, peg, pelt, pepper, pick off, pistol, pitch, pitchfork, plug, pot, potshoot, potshot, prime, put, put the shot, riddle, serve, shoot, shoot at, shoot down, shy, sling, snap, snipe, strike, take a potshot, throw, tilt, torpedo, tossROGET THESAURUS
let fly
Violence
VB be violent, run high, ferment, effervesce, romp, rampage, go on a rampage, run wild, run amuck, run riot, break the peace, rush, tear, rush headlong, rush foremost, raise a storm, make a riot, rough house, riot, storm, wreak, bear down, ride roughshod, out Herod, Herod, spread like wildfire (person), explode, make a row, kick up a row, boil, boil over, fume, foam, come on like a lion, bluster, rage, roar, fly off the handle, go bananas, go ape, blow one's top, blow one's cool, flip one's lid, hit the ceiling, hit the roof, fly into a rage (anger), break out, fly out, burst out, bounce, explode, go off, displode, fly, detonate, thunder, blow up, crump, flash, flare, burst, shock, strain, break open, force open, prize open, render violent, sharpen, stir up, quicken, excite, incite, annoy, urge, lash, stimulate, turn on, irritate, inflame, kindle, suscitate, foment, accelerate, aggravate, exasperate, exacerbate, convulse, infuriate, madden, lash into fury, fan the flame, add fuel to the flame, pour oil on the fire, oleum addere camino, explode, let fly, fly off, discharge, detonate, set off, detonize, fulminate.Propulsion
VB propel, project, throw, fling, cast, pitch, chuck, toss, jerk, heave, shy, hurl, flirt, fillip, dart, lance, tilt, ejaculate, jaculate, fulminate, bolt, drive, sling, pitchfork, send, send off, let off, fire off, discharge, shoot, launch, release, send forth, let fly, put in orbit, send into orbit, launch into orbit dash, put in motion, set in motion, set agoing, start, give a start, give an impulse to, impel, trundle, expel, carry one off one's legs, put to flight.For further exploring for "let fly" in Webster Dictionary Online