brim·mer I. \-mə(r)\noun (-s) Etymology:brim (II) + -er : a cup or glass brimful < feed the flame of their loyalty with copious brimmers — Sir Walter Scott > II. noun (-s) Etymology:brim (I) + -er 1.: a brimmed hat especially of straw 2.: a worker who makes brims for hats or provides hats with brims