Source : Webster's Revised Unabridged Dictionary (1913)

Rhymester \Rhyme"ster\, n.
   A rhymer; a maker of poor poetry. --Bp. Hall. Byron.

Source : WordNet®

rhymester
     n : a writer who composes rhymes; a maker of poor verses
         (usually used as terms of contempt for minor or inferior
         poets) [syn: {rhymer}, {versifier}, {poetizer}, {poetiser}]