Ask HN: When interviewing someone, what will definitely make you reject them?

Trying to BS me. I don't mind a bit of creative resume padding here and there, we all do it. However, don't lie to me and say you are an expert in something when you've done little more than view an introduction YouTube video on it. I will call you out and it will make us both uncomfortable.

Standing up on a table, pulling their pants down, and taking a shit. The question you ask is so broad it has an infinite amount of answers.