slim poes

Afrikaans slang word for an ignorant person who always corrects you, even if they are incorrect (acting like they know everything about any subject)

John: “Did you hear that JuiceWrld has passed away?”
Simon: “Nah I doubt, I would’ve heard of it or seen it somewhere online, it’s probably fake news.”
John: “Alright you slim poes, go look it up then.”