Teste de Fidelidade is a Brazilian television show hosted by João Kléber on RedeTV!, built around couples who secretly test a partner's loyalty with actors hired to tempt them. The staged confrontations and dramatic reveals made it a staple of Brazilian pop culture, and clips later spread widely on YouTube, WhatsApp and meme pages. The infiel verdict became a reusable shorthand online, posted whenever someone is caught flirting, lying or cheating, in Portuguese speaking communities and beyond, long after the original broadcast.