n. A breaking wind without noise: same as fist, 1.n. A puffball.n. A sly trick; a juggle; an imposition.n. A cheat; a sharper.n. A cutpurse; a pickpocket. Also foister.To work in by a trick; thrust in wrongfully, surreptitiously, or without warrant; insert or obtrude fraudulently or by imposition; pass or palm off as genuine or worthy: followed by in or into before the thing affected, and by upon before the person: as, to foist a spurious document upon one.To falsify or make fraudulent by some insertion; cog, as a die.To smell musty: same as fust.Same as foisty.n. A light and fast-sailing ship.