Goasting = goat + fisting, or goat fisting.
The process whereby one powerfists a goat, and then carries it around on their arm for several days, flapping one's arms like a large bird, saying "baw, baw, baw" with eyes crossed is goasting.
Women can also be
involved in the late stages as the goat falls off the arm, which can then be used to
cunt punch.