'Coughdrop' was a British unrealised airborne operation to take and destroy the U-boat pens at Lorient in the north-western part of German-occupied France (June 1943).

To have been undertaken in conjunction with a heavy bombing attack, the plan was cancelled after a reassessment at the instigation of Major General R. E. Laycock, chief of Combined Operations, had suggested its total impracticality, not least because there was no way that any of the assaulting forces could have been recovered, and in any event the forces which would have been required for its implementation were already earmarked for 'Husky' (i).