Yukon picklefork
Also known as the shocker, this phrase describes a sexual act in which the index finger is inserted into a woman's vagina and the pinky on the same hand is inserted into the anus.  When the thumb is then used to stimulate the clitoris, this act is known as the "Yukon picklefork with a courtesy windsheild wiper".  
Did you give her the Yukon picklefork?
What?
You know, the Yukon picklefork with a courtesy windsheild wiper (demonstrates with hand).  