An insult used by traders and the investment community for whenever someone egregiously short-sells a stock/commodity/cryptocurrency to the point of insolvency.
"Hey did you see that huge 3000 BTC short at $12,500 get liquidated at $15,000?"
"Yea bro, what a Melvin, everybody knows that all bears die."
What you call someone that can't think for themselves and only cares about his own self. They often hit people for their own amusement and hurt other people, and apparently it's okay to do so if they're a Melvin. They're a bitch most of the time and whenever you stumble upon them you get the urge to beat the shit out of them, but it really isn't their fault since it's their personality to be a Melvin. They sound like a drunk cow trying to talk.
You're such a melvin
fuck you melvin, go die
Another word to describe a nerd
There a tattletale, annoying, teachers pet, and brags about there IQ even though no one cares
Handsome, great at football, Hates jake paul, And better than any Ethen