a sexual act similar to the shocker but instead of the pointer and index side by side you cross, or twist, them if u will, so that the feeling is that much more erotic when inserted into the girl
dubsys: holy shit, i cant even walk straight due to that insane twister last night!
kdawg: we had a tornado? what?
dubsys: no dude bayard gave me the hottest twister in bed, it drove me wild
kdawg: ohhhh, that twister