Cad (?), n. [Abbrev. fr. cadet.]
1.
A person who stands at the door of an omnibus to open and shut it, and to receive fares; an idle hanger-on about innyards.
[Eng.]
Dickens.
2.
A lowbred, presuming person; a mean, vulgar fellow.
[Cant]
Thackeray.
© Webster 1913.