“Ratinho” is the stage name of Carlos Massa, the Brazilian television presenter who has hosted the variety show Programa do Ratinho on SBT since 1998. Shouting his name in a stretched, chant-like “Ratinhooo” became a running joke among viewers, and short clips of the chant spread through Brazilian messaging groups, meme pages and short-video edits. Because the show has aired for decades, the name carries instant recognition in Brazil, which keeps the two-second shout useful as a hype and comedy cue.