mouthful

nosh, snack

appetizer, canapé, hors d'oeuvre

bit, chew, crumb, dab, dribble, driblet, fleck, hint, mote, nubbin, particle, pinch, scrap, scruple, shred, smidgen (also smidgeon), snip, snippet, speck, spot, sprinkling, suspicion, tittle, touch, trace