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1.
one who scampers, usually while in possession of some trinket s/he has light-fingered from a store display, usually out of the store.
Store Detective: "Judging by your cheesy outfit, I had you pegged as a scamperer from the moment you walked in!"

Scamperer (clutching a solid-sterling-silver letter trivet): "Are youse kiddin', Boss? I wuz gonna buy dis!"
by The Camarillo Kid July 23, 2008