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From The Collaborative International Dictionary of English v.0.48:
Ruff \Ruff\, v. t. [imp. & p. p. Ruffed; p. pr. & vb. n. Ruffing.] 1. To ruffle; to disorder. --Spenser. [1913 Webster] 2. (Mil.) To beat with the ruff or ruffle, as a drum. [1913 Webster] 3. (Hawking) To hit, as the prey, without fixing it. [1913 Webster] 4. (Card Playing) To play a trump card at bridge; as, he ruffed his partner's ace. [PJC] Ruff