jag (Noun) — A sharp projection on an edge or surface. ex. "he clutched a jag of the rock"
jag (Noun) — A slit in a garment that exposes material of a different colour underneath; used in Renaissance clothing.
jag (Noun) — A flap along the edge of a garment; used in medieval clothing.
jag (Noun) — A bout of drinking or drug taking.
jag (Noun) — 10 grams.
jag (Noun) — A Jaguar car.
jag (Verb) — Cut teeth into; make a jagged cutting edge.