saddlebag /ˈsædəlˌbæɡ/noun 5verb 2forms 3 noun5 •A covered pouch, usually one of a pair, laid across the back of a horse, donkey, or mule behind its saddle, or hanging over the rear wheel of a motorcycle; often made of leather or (on a motorcycle) a rigid material.There was no camp, bedroll, or fire and no other sign of a man, just the saddled horse with saddlebags and packs tied on behind it. — 2010 •A seat pack or a seat bag (a pouch or a small bag attached to the seat or seat post of a bicycle) •(nonstandard) pannier •[in the plural] (US, informal) Loose fatty flesh on a person's upper thighs or buttocks, that hangs like saddlebags.The area treated was always the side of the thighs, where she had visible saddlebags. — 2002 •A style of house with two rooms separated by a small hall and open space. verb2 •To place in a saddlebag. •To put a saddlebag on (an animal). formssaddlebagged · saddlebagging · saddlebags