Definition of "billy" in English

noun

1. A fellow, companion, comrade, mate; partner, brother.

2. (Geordie) A good friend.

3. A billy goat.

   • 1970 August, Valerius Geist, Mountain Goat Mysteries, Field & Stream, page 62, Then, during three days, I was amazed to see nannies with kids attack and chase off large billies.

4. (UK, slang, obsolete) A silk handkerchief.

noun

1. A highwayman's club, billy club.

2. A slubbing or roving machine.

3. (Australia, New Zealand) A tin with a swing handle used to boil tea over an open fire; a billycan; a billypot.

   • Let's get the billy and cook some beans.

4. (Australia, slang) A bong for smoking marijuana.

5. (slang) A condom.