- billy⇄billy (1), noun, pl.-lies.
(Scottish.) a companion. - billy⇄billy (1), noun, pl.-lies.
1. (U.S.) a policeman's club or stick; nightstick; truncheon.
2. any stick or club.
3. a billy goat.
4. Also, billycan.
a. (in Australia) a kettle, can, or pot for making tea or for cooking. <