An extremely creepy person; usually referred to as a man, but can also be a woman. Comes from the actor, Rob Schneider, who is rather creepy looking. Funny, but creepy.
"Who is that lurking in the darkness?"
"Eeeew, what a schneider!"
"Wow, that guy in the car next to us is such a schneider. He keeps staring!"
"Why are molesters always schneiders? Like, why do they always look super creepy?"
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