From The Collaborative International Dictionary of English v.0.48 [gcide]: Hash \Hash\, v. t. [imp. & p. p. Hashed (h[a^]sht); p. pr. & vb. n. Hashing.] [From Hash, n.: cf. F. hacher to hash.] To chop into small pieces; to mince and mix; as, to hash meat. --Hudibras. Hasheesh
From The Free On-line Dictionary of Computing (19 Sep 2003) [foldoc]:
hashing
hash coding