Lash  —v. 1 make a sudden whiplike movement. 2 beat with a whip etc. 3 (often foll. By against, down, etc.) (of rain etc.) Beat, strike. 4 criticize harshly. 5 rouse, incite. 6 (foll. By down, together, etc.) Fasten with a cord etc. —n. 1 sharp blow made by a whip etc. 2 flexible end of a whip. 3 eyelash.  lash out 1 speak or hit out angrily. 2 colloq. Spend money extravagantly. [imitative]