Alexey Gerasimov (Russian: Алексей Герасимов), better known online as DaFuq!?Boom! (also known as blugray), is a YouTuber who creates SFM animations and parodies containing elements from various games, mainly Grand Theft Auto: San Andreas and Garry's Mod. He gained subsequent popularity thanks to his ongoing series "Skibidi Toilet" that currently spans over 50 episodes as of July 2023 and his parody of a song by the Norwegian band Ylvis' "What Does the Fox Say?" under the title "What Does the Big Smoke Say?". As of June 2023, he is currently the fastest growing YouTuber.