Angry Dolphin
The aformentioned angry dolphin is not correct. The true angry dolphin involves normal sex, as in where the "hrum" is in the "vageen" (according to Borat), and the man proceeds to pull out and insert into the woman's ass. Angered, the woman responds with the yelling of "Enh! Enh! Enh! Enh!!!!" This is basically the sound a dolphin makes. Assuming the chic isnt into anal, she will emit this sound with much anger, but you'll probably do it anyway....because deep down she really wants it. 
The dude wss giving intense doggie, and then tried to finish in her ass. She responded with the angry dolphin, but he did it anyway....that bitch.