[bum.per] n [prob. fr. bump to bulge] (1676) 1: a brimming cup or glass
2: something unusually large
[2]bumper adj (1885) 1: unusually large "a ~ crop"
2: banner
2. [3]bump.er n (1839) 1: a device for absorbing shock or preventing damage (as in collision); specif: a usu. metal bar at either end of an automobile
2: one that bumps