Chinese slang (?)

I'm having some trouble with 脱线 as an adjective. The context is that this is from a story in which a group of crazy half-naked guys refers to themselves as the 脱线帅哥.

On nciku, the closest I can find is that 脱线的 means "threadbare". However, I found this explanation on a Chinese site that seems to point to it being slang for "crazy":

“脱线”的确是“痴线”的囯语版，但是“痴线”的原型是“粘线”（广东话口语的“粘”音为ci），也就是神经粘在一起，就是神经有问题了

Can anyone confirm the meaning of this word?

Thanks :)