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Tila throws a Twit fit at Casey’s family

She puts the worm in Tequila.

Casey Johnson’s tacky gal pal, Tila Tequila, lashed out at the family of the tragic baby-shampoo heiress yesterday, calling them “piece[s] of s- – -” who “abandoned” their daughter.

A day after the Johnson & Johnson scion’s celeb pals Nicky Hilton and Bijou Phillips stormed into Tequila’s Los Angeles home to take back Johnson’s dogs and other belongings, the former reality-show star unleashed a Twitter tirade, attacking her fiancée’s family and friends.

PHOTOS: LIFE OF CASEY JOHNSON

PHOTOS: HILTON, PHILLIPS COLLECT CASEY’S THINGS

“Some ppl think just cuz they’re rich that they can just stomp all over other ppl. Even if that means taking away their daughters happiness!” the diminutive D-lister blathered.

“My Wife hated them. Just wait til I tell everyone the truth I have proof, and the family is a piece of s- – -. No wonder she wanted 2 marry me.”

Tequila, whose real name is Tila Nguyen, claimed she and Johnson, daughter of Jets owner Woody Johnson, had gotten engaged in the weeks before the heiress died and that her “wifey” had planned to change her name to Casey Nguyen.

“Her family abandoned her for 5 years, her friends never called her, ONLY I DID,” Tequila tweeted. “Who was there for her? I WAS! I took care of EVERYTHING! While her ‘friends’ used her!”

“Now that she’s gone her family and so called ‘FRIENDS’ pop up at my house, stealing our stuff & acting like they care? BULLS- – -!” she wrote. “Money doesn’t buy you class.”

A source close to the Johnson family said they were tired of Tequila.

“It would be nice if Tila showed a shred of dignity through this process,” the source said.

“Having lost a daughter and a sister, the Johnson family are trying to maintain their dignity at a very emotional time, but it is being made much more difficult by somebody who clearly sees this bereavement as a career and publicity opportunity.”

Earlier in the day, Tequila appeared in a video on RadarOnline.com in which she rambled about her love for Johnson.

In another video on the site, the celebutard pranced and posed in a bosom-baring top and short shorts for a gaggle of photographers outside her LA home — flirtily sticking flowers into her cleavage and clucking about her plans.

Meanwhile, sources said Tequila was negotiating to appear on “Larry King Live” next week.

Johnson’s body was found in her Los Angeles home on Jan. 4. TMZ reported Casey’s daughter, Ava, would be raised by grandmother Sale Johnson. .

lukas.alpert@nypost.com