A sexual move where a man puts his hand into the Vulcan "V" shape like Spock from Star Trek - two fingers together to the right and two fingers together to the left with a V shape in the middle. Next, he places his thumb on a woman's clitoris, inserts his pointer finger and middle finger into her vagina, and inserts his ring finger and pinky into her anus. He then shakes his hand vigorously until she orgasms.
Bill: "Did you have sex with Rita?"
Ted: "No, but I gave her the Vulcan Handshake until she screamed for mercy!"
The act of two females uniting vajines in a punnanny wiggle
My crotch really burns after a vigorous vulcan handshake