billy goat(n = noun.animal) billy, he-goat - male goat;
is a kind of caprine animal, goat
A male goat. [1913 Webster]
N man, male, he, him, manhood, gentleman, sir, master, sahib, yeoman, wight, swain, fellow, blade, beau, elf, chap, gaffer, good man, husband, Mr, mister, boy, cock, drake, gander, dog, boar, stag, hart, buck, horse, entire horse, stallion, gibcat, tomcat, he goat, Billy goat, ram, tup, bull, bullock, capon, ox, gelding, steer, stot, androgen, homosexual, gay, queen, male, he-, masculine, manly, virile, unwomanly, unfeminine, Pron, he, him, his, hominem pagina nostra sapit, homo homini aut deus aut lupus, homo vitae commodatus non donatus est.
angora goat, bezoar goat, billy, billy buttons, billy club, billy graham, billy mitchell, billy sunday, billy wilder, capricorn the goat, cashmere goat, domestic goat, forest goat, gnu goat, goat, goat antelope, goat cheese, goat god, goat grass, goat herder, goat rue, goat willow, jaal goat, jemlah goat, kashmir goat, mountain goat, rocky mountain goat, wild goat