See Also:

rat(3) (iou)



rat verb1. [rat] Infl. -tt-. E19.
[from RAT noun1.]
verb intrans.
a. Desert one's party, side, cause, etc. colloq. E19.
b. Let a person down; behave disloyally; inform. Chiefly foll. by on. colloq. M20.
Literary Review Witnesses..ratting on former colleagues. K. Lette He's a solicitor who's ratted on a client! He could be struck off for that, you know!
verb intrans. Hunt, catch, or kill rats. E19.
verb trans. Search (a person) for things to steal, rob; pilfer. slang (chiefly Austral. & NZ). L19.