Days after using Twitter to call retail giant Walmart liars for "blackballing" his new album from their stores (which they aren't), Chris Brown has made like Miley and quit the micro-blogging craze.

Brown's Twitter home, @mechanicalDummy now "doesn't exist," leaving fans wondering: what happened to Chris?

On Friday, Brown lamented that "major stores" like Walmart "r blackballing my cd. not stockin the shelves and lying to costumers. what the f--k do i gotta do." He quickly added, noting that his words would certainly be publicized and used against him: "yeah i said it and i aint retracting s--t. im not biting my tongue about s else..."