Revealed: Tamra Barney's Foul Mouthed Tweet Slamming Fiancé Of Ex-Gal Pal Gretchen Rossi -- Slade Smiley Is 'A Deadbeat With A Sick Son’

Beware of the deleted tweet.

Tamra Barney might not be afraid to dish out the sass online, but a recent f-bomb missive that she sent slamming Gretchen Rossi’s fiancé Slade Smiley -- in which she called him a “f**kcer” and a “deadbeat” -- quickly disappeared, RadarOnline.com has learned.

The supposed "Monster Mom" -- current embroiled in a vicious custody battle with her ex-husband Simon Barney -- took aim at a Real Housewives of Orange County fan who suggested she was a hypocrite.

Bridgette Ramirez wrote on the social media site: “@TamraBarney Would Talk About @SladeSmiley ALL The Time, But Now That Roles Are Reversed..She DOESN'T Like It! @GretchenRossi #Karma”

It prompted a stunning response from the mother-of-four.

She wrote: "Oh plz. That f**ker is a deadbeat with a sick son. Keep supporting him, it makes you look Real good!”

As RadarOnline.com previously reported, Smiley and his ex-wife battled over support for his child but they have settled on an amount that the one-time Bravo star pays for the medical treatment of his young son, who was diagnosed with cancer.

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What do you think about Tamra’s f-bomb tweet? Was it fair? Sound off in comments below.