BILLY Meaning of BILLY in English bil ‧ ly /ˈbɪli/ BrE AmE ( also bil‧ly‧can /ˈbɪlikæn/) noun ( plural billies ) [countable] British English a pot for cooking or boiling water when you are camping Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012