Also found in: Dictionary, Thesaurus, Medical, Wikipedia.
slang A condom. Primarily heard in UK, Ireland. Remember, mate: only a fool doesn't wear a rubber johnny on a one-night stand. In an effort to promote safe sexual practices, the student union began handing our rubber johnnies to everyone passing by.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.