1. An unnatural drift of a dry fly, due to current acting on a taut leader.
2. The mechanism in a fishing reel that produces friction when a fish is pulling line from the reel.
3. Two Definitions Here. And No, One Of Them Is Not Dennis Rodman. This Could Be Referred To As The Braking Mechanism In Your Reel Or The Art Of Trolling, Which Is Simply Dragging Lures Behind The Boat.
4. a mechanical device built into a reel that, when engaged, exerts an adjustable range of pressure on the spool to permit a controlled release of fishing line from the reel; a properly utilized drag prevents line from breaking or hooks from pulling out when fish are hooked