Charlie Sheen Rips Rihanna -- Yes I AM a Queen ... The Queen of Mean

Rihanna is in over her head -- Charlie Sheen has just issued a biting response to the singer's "queen" jab ... mocking her subpar command of the English language.

Charlie issued the response to TMZ in (what else) poem format:

"Dear Ms. Rihan-
oh wait, no last name,
Okay, Dear R -
clearly English is NOT
your primary language.

Firstly I want to thank you for recognizing me as Royalty. I'm flattered.
And secondly;
do the good Queen a favor and go tend to the dungeon in my Castle.
But beware of the
rats and the snakes.
They stir with folly
awaiting your tepid advance,
in the shadows..."

later Doosh!
cs"