Source : Webster's Revised Unabridged Dictionary (1913)

Scorch \Scorch\, v. i.
   To ride or drive at great, usually at excessive, speed; --
   applied chiefly to automobilists and bicyclists. [Colloq.] --
   {Scorch"er}, n. [Colloq.]

Source : WordNet®

scorcher
     n 1: an extremely hot day
     2: a very hard hit ball [syn: {screamer}]