1. a person or thing that reaches or forms the bottom of something
Usage: informal; often used in compound contexts
2. in cricket, a batsman who bats in the lower order
Usage: sports; chiefly British

Examples

• The bottomer of the barrel contained the oldest wine.
• He was a reliable bottomer in the team's batting lineup.
• The ship's bottomer was reinforced to withstand rough seas.
• As a bottomer, he rarely faced the opening bowlers.
• The bottomer of the stack held all the weight.