The general action a female verbally gestures- UH!UH! when during doggy style sex- you try and sneak the penis from her vagina, to her anus, without her conscent.
Eric: damn mike........ my girl gave me the dolphin last night. I tried to sneak some anal and she snapped her head around and went "UH! UH!" Mike: that sucks man, but I geuss it does sound like the dolphin
During Sex, when a male is near ejaculation, he locks his arms flat to his sides, goes rigid, arches his back, and makes dolphin noises while he orgasms. Variations include the slight kicking of ones legs in dolphin-like motion.
Hans was really giving it to a girl last night, and when he got off, he totally gave her the dolphin. I heard him.