A phrase that really originated from Mean Girls said by Regina George. This was adapted by the internet, probably 4chan, and has been used when one is speechless and shocked.
An expression used to convey the extent that one does not care about something in a ghetto-like manner, while still remaining white.
Example:
Yvonne: "Hey Erin, you should fake bake sometime. You're so white you're almost transparent."
Erin: "I don't even curr. Tan people can kiss my arse."