Charlie Sheen is FURIOUS at Farrah Abraham for allegedly leaking their private text message conversation -- and TMZ has learned, he's already sent her the most epic rejection letter of all time ... calling her "a desperate guzzler of stagnant douche agua."
And that's just the beginning. Seriously. Charlie does NOT hold back. Here's the full transcript:
TMZ broke the story ... Farrah reached out to Charlie back in May via text message, saying she hopes to meet Sheen if she can score herself a role on "Anger Management." Charlie responded favorably, agreeing to meet up, but now ... it appears that's changed.
Translation: Farrah can forget about a playdate with Charlie ... but at least she's still a millionaire.