A male goat; a ram.
A good friend.
A billy club.
A billy goat.
A slubbing or roving machine.
A bong for smoking marijuana.
A tin with a swing handle used to boil tea over an open fire; a billycan; a billypot.
A condom.
Any of a group of herbivore mammals, the subfamily Caprinae, that includes domestic sheep and goats.