A sexual act consisting of the index and middle fingers in the vagina and the ring and pinky fingers in the anus. Spock used this hand gesture just not in a sexual way.

AKA
2 in the pink, 2 in the stink

Sexual maneuver in which the administrator delivers the seemingly innocent shocker in an intriguing manner. The index finger and middle finger is crossed over one another and the pinky finger is extended in anticipation. The delivery is in the same manner as shocker. The maneuver was originated in a small town in Ohio, after observing the twisted manner in which things are done in Las Vegas. Hence, the name Las Vegas Crossover was dubbed and has stuck ever since.

A form of fingering where two fingers are inserted into the vagina and two fingers are inserted into the anus. The fingers used are on one hand making the Spock sign from Star Trek