Matthew Kai Stonie (born 1991 or 1992)[2][3][4] is an American competitive eater and YouTuber.

Stonie won the 2015 Nathan's Hot Dog Eating Contest, besting 8-time defending champion Joey Chestnut among others.

[5] Stonie has gained fame from his YouTube channel, to which he uploads video footage of his eating challenges.

[4] Stonie's younger brother Morgan was oftentimes involved with the production of the challenges uploaded to his YouTube channel early in his career.

[16] In September 2024, Stonie participated in the opening undercard match of the livestreamed Netflix event Chestnut vs. Kobayashi: Unfinished Beef.