chisel

an edge tool with a flat steel blade with a cutting edge

engage in deceitful behavior; practice trickery or fraud; "Who's chiseling on the side?"

deprive somebody of something by deceit; "The con-man beat me out of $50"; "This salesman ripped us off!"; "we were cheated by their clever-sounding scheme"; "They chiseled me out of my money"

carve with a chisel; "chisel the marble"