1.NounA rascal, swindler, or rogue; a ne'er-do-well.
2.NounA mischievous person, especially a playful, impish youngster.
"My nephew is a little scamp who likes to leave lighted firecrackers under the lawnchairs of his dozing elders.; While walking home from the bar, he was set upon by a bunch of scamps who stole his hat."
3.VerbTo skimp; to do something in a skimpy or slipshod fashion.