Definitions for saddlebagˈsæd lˌbæg
Random House Webster's College Dictionary
a large bag or pouch, usu. one of a pair, hung from a saddle, laid over the back of a horse behind the saddle, or mounted on the rear of a bicycle or motorcycle.
Often, saddlebags. excess fat around the hips and buttocks.
Origin of saddlebag:
a large bag (or pair of bags) hung over a saddle
One of a pair of covered pouches, usually leather, laid across the back of a horse behind the saddle, or hanging over the rear wheel of a bicycle or motorcycle, frequently made of a rigid material.
The lateral fat on a person's upper thighs (in that case sometimes also known as "riding breeches") or buttocks, that hangs loosely, like saddlebags.