To ride a crotch rocket in a high speed race, with crashes and arrests a-plenty. The term is derived from the "rash" left on the ground as the wheels screech across it during the turns.
Also refers to rasher doing wheelspins on one's genitalia because you fucked his girlfriend.
a RASH is a Russian anal sex whore. it is an adjective used in Oklahoma for a bitch or a women who is a total skank.
alex: hey jonathan do you know who that lindsey chick is?
jonathan: yah i met her shes hot but she's a total RASH
alex: one thing i hate is russian sex whores and oompa loompas jonathan: amen.
P1: "Whoa Peggy-Sue, what're those red bumps around your honeypot?
P2: "Oh Jimmy, that's just a little rash - totally harmless! Wanna taste the honey?"
P3: Breaks out in song..."Oh baby youuu, you got a diseeaase...and you say its just a rash, but its all up in your a**. Ohhh baby youuu...!!"