noun
competitive eater; eating contest participant
Refers to a person who takes part in eating competitions, often professionally.
彼は有名な大食い選手だ。
He is a famous competitive eater.
新人の大食い選手が大会記録を更新した。
A rookie competitive eater set a new tournament record.
大食い means 'eating a lot' or 'gluttony', while 大食い選手 specifically refers to a person who competes in eating contests.
Compound of 大食い (おおぐい, 'eating a lot') and 選手 (せんしゅ, 'player' or 'competitor').