Name: The Eeyore

Identifying Characteristics:
The Eeyore loves wallowing in her own crap. Her job? Oh yeah, she hates it, but don't tell her to quit. She never, ever will. She's been single since "Felicity" went off the air and says she wants a boyfriend, but don't bother suggesting she try Match.com. She'll just laugh in your face. Eeyores love the sound of their own bitching.

Field Study: "Angie refuses to get over this guy she dated in college," says Meredith, 25, of her best friend. "Actually, she refuses to move on from college at all, so ever since then, she's been kind of a downer." But, says Meredith, she won't give up on the friendship because they've known each other for so long, and Angie helped her through her last major breakup.

More after the jump.

Why You Keep the Eeyore Around: There are usually mitigating circumstances to the Eeyore's depressing behavior -- something that makes it short term or manageable. But when a friend is in a full-scale Eeyore rut, you may need to do something about it -- like call in the professionals. Or stop calling her.

Got a Friend Terrorist -- a super-toxic friend -- you want to tell us about? Share your story in the comments or drop us a line! We promise we'll change all identifying characteristics and incriminating details!