Bumper

Part of speech: noun (n.)

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. A covered house at a theater, etc., in honor of some favorite performer. [Cant]

Part of speech: noun (n.)

1. That which bumps or causes a bump.

2. Anything which resists or deadens a bump or shock; a buffer.