Dosia is the nickname of Mikhail Stolyarov, the Russian Counter-Strike player whose clever HE grenade on Inferno became a famous example of game sense in CS:GO. The Portuguese phrase in the clip means look at Dosia's HE, and Brazilian players and streamers repeat it whenever a grenade is about to punish players grouped in a corner. Shared as a short soundboard clip like other FPS callouts such as Boom! Headshot!, it survives because one line instantly signals a smart, doomed grenade play.