billy /ˈbɪli/noun 9forms 1 noun9 •A billy goat.Then, during three days, I was amazed to see nannies with kids attack and chase off large billies. — 1970 •A highwayman's club, billy club. •(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. •A fellow, companion, comrade, mate; partner, brother. •A good friend.Fareweel, my rhyme-composing billie! / Your native soil was right ill-willie; / But may ye flourish like a lily, / Now bonilie! / I'll toast ye in my hindmost gillie, / Tho' owre the Sea! — 1786 •(Australia, slang) A bong for smoking marijuana. •(slang) A condom. •A slubbing or roving machine.On the second floor there were 2 billies, 1 carding and 1 scribbling machine. — 1967 •(slang, no longer used) A silk handkerchief.All fighting coves you too must know, / Ben Caunt as well as Bendigo, / And to each mill be sure to go, / […] And you must sport a blue billy, / Or a yellow wipe […] — 1859 formsbillies