Source : Webster's Revised Unabridged Dictionary (1913)

Ruttish \Rut"tish\, a.
   Inclined to rut; lustful; libidinous; salacious. --Shak. --
   {Rut"tish*ness}, n.

Source : WordNet®

ruttish
     adj : feeling great sexual desire; "feeling horny" [syn: {aroused},
            {horny}, {randy}, {turned on(p)}]