The Optimus is when a male sticks is face into a woman's vaginal region, places his lips down on her labia and mutters "Roll Out" in a deep voice. This usually results in a instant orgasm from the female followed by an erection for the male which may last longer than 4 hours.
Female: Hey baby, I'm tired of the Shocker, the Annihilater, and the Devastator. Try something new.
Male: *Thinks of Transformer named Devastator* Can I try the Optimus?