Meaning

noun a glass filled to the brim (especially as a toast)

noun a mechanical device consisting of bars at either end of a vehicle to absorb shock and prevent serious damage

originEtymology tree English bump Proto-Indo-European *-yósder. Proto-Italic *-āzijos Latin -āriusnom. Latin -āriusbor. Proto-Germanic *-ārijaz Proto-West Germanic *-ārī Old English -ere Middle English -ere English -er English bumper From bump + -er.

Etymology from Wiktionary, CC BY-SA 3.0