Goat is an acronym for "greatest of all time", pussymay refer to vagina or the woman herself.
Goatpussy may refer to:
(1) The most sexually attractive woman, used informally to imply someone you find very sexy
(2) A woman with whom you've had the best sex in your life
Hey, John. Look who showed up, the goatpussy and her friends.
Jennica was the goatpussy in my life.