it's always sunny in philadelphia?

[never danced before]

Some guy at my work told me the i'm really like the character Charlie from the show "it's always sunny in philadelphia". I've never seen the show, what's that character like? and is that a good thing i'm like Charlie?
@Comet Potter, I have no idea what you are talking about?
@ Comet Potter, ok...? but i really don't understand how that song relates to this?