Douglas Harper's Etymology Dictionary
goaty
"goat-like," c.1600, from goat + -y (2).
Wiktionary
goaty
a. Like a goat, goatlike or redolent of goats.
Usage examples of "goaty".
The other was, of course, Dim, who had used to be my droog and also the enemy of stinking fatty goaty Billyboy, but was now a millicent with uniform and shlem and whip to keep order.
The back of her hand somehow passed across the front of my trousers, and an erection the goatiest of fifteen-year-olds would envy sprang to life.