The profanity-laden rant began with a tweet that read, "Brooke M is a sexy rok star whom I adore D Richards a heretic washed up piglet Shame pile Happy Father's Day!!!"
"Brooke M" is presumably Sheen's ex-wife Brook Mueller, the mother of Sheen's twin 6-year-old sons Bob and Max. Sheen divorced Mueller in 2011.
After a slew of similarly aggressive tweets, Sheen posted an open letter, slamming Richards with a string of incoherent and almost nonsensical paragraphs.
While Sheen went through and deleted all the tweets slamming his ex, his profanity-riddled "open letter to the media" is still available to read online. It could be considered NSFW due to the massive amount of curse words in the letter.
In it, Sheen shares poetic gems such as, "Denise Richards is a shake down piece of s**t doosh phace," and, "see u in court you evil terrorist sack of landfill rash." And those are the most tame comments from the "open letter."
Richards, however, has kept her responses classy and profanity free. She tweeted on Sunday, "Happy Dad's Day! @charliesheen have a great trip in Mexico! Kids were disappointed u weren't here for it- Hey we'll celebrate when u r back!"
Happy Dad's Day! @charliesheen have a great trip in Mexico! Kids were disappointed u weren't here for it- Hey we'll celebrate when u r back!— Denise Richards (@DENISE_RICHARDS) June 21, 2015
When one of Richards' followers asked if Sheen was in Mexico for work, she replied simply, "Nope."
Sheen and Richards have had a combative relationship since their divorce in 2006. Sheen previously accused Richards of not allowing him to see their children, and in 2013 he tried to reduce the amount of child support he was required to pay her, arguing that he was "being punished" by Richards after their divorce.