Coach·whip snake Zool. A large, slender, harmless snake of the southern United States (Masticophis flagelliformis).
  Note: ☞ Its long and tapering tail has the scales so arranged and colored as to give it a braided appearance, whence the name.
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  coachwhip snake
       n : a whipsnake of southern United States and Mexico; tail
           resembles a braided whip [syn: coachwhip, Masticophis
           flagellum]