A derogatory term for a female vagina whose vulva appears larger and darker than the rest of her genitals, resembling the roast beef in an Arby's sandwich. This term is typically used by incels to imply that a woman is a slut or a whore.
Despite the fact that too much sex doesn't make a dick smaller, many men who get their sex education only from porn claim that too much sex makes a pussy worn out and look like Arby's roast beef.
A trial that consists of someone trying to eat ten Arby's roast beef sandwiches, usually within an alloted time limit. The contest is most regularly held in conjunction with the "Five for Five Round-up". Also known as "The Roast Beef Challenge".
Max made it to nine at the last Arby's Challenge. Then he vomited at the front of that law firm.