The nick name for a fan of a popular rock band called "THE DARKNESS".
Darklings are close followers of the band, not just those who think a song is great and then get bored and ignore them.
"So, you're a fan of The Darkness then?"
"Yeah, that'd make me a Darkling, rock on dude"
Phrase used when something does not scratch up to standards.
Most often used as in to say that something was not very good, unacceptable etc.
"Man, that joke was low!"