Matt Berry is a British actor and comedian famous for his booming, theatrical voice in shows like What We Do in the Shadows, where he plays Laszlo Cravensworth, and Toast of London. Clips of his exaggerated line readings circulate widely as reaction memes because his delivery makes even a single word feel like a verdict. This bullshit shout is used the same way, dropped over dubious claims in edits and streams. It sits alongside other blunt reaction sounds like you what and shut up mom in compilations.