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1. An implement consisting of handle with a free swinging stick at the end; used in manual threshing

1. Beat hard and repeatedly, esp. with a whip, cane, etc.
   - thrash, thresh, lam [informal]
    
2. Swing or move in a random unstable way
   "Her arms were flailing";
   - thresh

Derived forms: flailed, flailing, flails

Type of: beat, beat up, flap, implement, work over

Encyclopedia: Flail