Charlie Sheen to Phil Robertson -- Apologize ... Or Face a 'Masheen Style Media Beatdown'

Charlie Sheen just WENT OFF on "Duck Dynasty" star Phil Robertson -- threatening to unleash a monstrous media attack on the reality star ... unless he makes amends with gay people.

Sheen posted the long diatribe on Twitter ... and quickly put Phil on notice saying, "just when your desperately sub evolved ass thought the pressure was off, you are now in the crosshairs of a MaSheen style media beat down."

Charlie claims he's only voicing his opinion out of the blue for one reason ... to stick up for all his gay friends whose voices are not as powerful.

The letter is filled with classic Sheenism's -- like calling Phil a "shower-dodger", something about Charlie whittling his "cosmic banjo" ... and even a "news flash" for old times sake.

your statements were and are
abhorrently and
mendaciously unforgivable.

the idea that you have a job
outside of dirt-clod stacking
is a miracle.

the only 'Dynasty' you are attached to might be the
re-runs of that dated show.

the only thing you should ever be in charge of building is a hole in the ground the exact size of
your head.
perhaps your beard would fit as well if you plucked out the
army of scabies and
bull weevils sequestered deep in it's sarcophagus of dander and weasel pelts.

shame on you.
you're the only surviving
brain donor I've ever known.

when the gators and Egrets
kick you out of their
hovel,
you need to make serious amends to those you have
radically offended.

on the eight day
when I was whittling my cosmic banjo,
I'm pretty sure YOU were the scattered dross I then used to light a fire and
locate the nearest
Andy Gump.

repulsed by you;
c sheen