BUMPER

bumper. Bumper, n. a glass filled with liquor to the brim

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Bum″per (�), n. [[A corruption of bumbard, bombard, a large drinking vessel.]] 1. 1. A cup or glass filled to the brim, or till the liquor runs over, particularly in drinking a health or toast.
He frothed his bumpers to the brim. Tennyson. 2. 2. A covered house at a theater, etc., in honor of some favorite performer.