Here's a celeb feud nobody saw coming!
Especially not Charlie Sheen's fiancee, because in the porno academy they're taught to close their eyes right before the "big bang"!
Tigerblood and his pretty porn starlet Brett Rossi (also known as Scottine) dined together at Il Ristorante di Giorgio Baldi in Santa Monica on Wednesday night, but they weren't the only celebrities getting their grub on!
Rihanna was chowing down, too!
Charlie's lady is a huge fan of the S&M singer — makes sense — so he sent a carrier pigeon or whatever over to RiRi's table and requested a sit down with the main girl herself.
But guess what? Ri rejected his request, apparently offering to reschedule it for another time.
This predictably sent warlock into a wild rage!! He took to Twitter and unleashed a 300+ word rant about how she won't last in the biz, how she's a phony, and then he talked smack about her pretty pink hair!!!
At one point he even called her an idiot!!!! He barked: