131scam — 1963, noun and verb, U.S. slang, a carnival term, of unknown origin. Perhaps related to 19c. British slang scamp cheater, swindler (see SCAMP (Cf. scamp) (n.)) …
Etymology dictionary
132Scampish — Scamp ish, a. Of or like a scamp; knavish; as, scampish conduct. [1913 Webster] …
The Collaborative International Dictionary of English