ringsider

[ ring-sahy-der ]
/ ˈrɪŋˌsaɪ dər /

noun

a spectator at or near ringside, as of a boxing match or a nightclub performance.

Origin of ringsider

First recorded in 1895–1900; ringside + -er1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019