A fake number you give to someone when you don't want them to know your real number, especially if they want to go out with you. This is a joke that, while being very cruel, can also be quite amusing.
When I called up 305-241-003, I got this message: "Hello, this is in not the person you were trying to reach. You have reached the Rejection Hotline! The person who gave you this number did not want you to have their real number. I know this sucks, but don't be too devastated. So, why were you given the Rejection Hotline number? Maybe you're just not this person's type. Note: This could mean short, fat, ugly, dumb, annoying, arrogant or just a general loser. Maybe you suffer from bad breath, body odor, or a nasty combination of the two. Maybe you just gave off that creepy overbearing, psycho-stalker vibe. Maybe the idea of going out with you just seems as appealing as playing leapfrog with unicorns. Regardless of the reasons, please take the hint. Accept the fact you were rejected, then get over it. And please, do your best to forget about the person who gave you this number, because trust us, they have already forgotten about you."