he

if heyyyy means that that person is interested in you, and the each extra "y" means that that person in interested in you more, then this word basically is a shorter version of : "Fuck off I don't like you"

A: heyyyyyyyyyyy how's it's going
B: he

hack

that word that make non-tech-savvy people: "WHOA THERE HACKER IM GETTING YOU TO JAIL!"

A: I hacked into that toaster!
B: What? I'm calling the cops you criminal!

chair

A chair is chair, and it is a object that exist. Or is it?

A: How are you?
Michael: Do chair exist?