IN a dig designed to push BRAD PITT’s buttons, ANGELINA JOLIE insulted his manhood, and the devastated actor has gone on a drunken rampage!

The Oscar-winning beauty told an astonished Brad that her former flame, Irish actor stud Colin Far­rell, put him to shame between the sheets, and sources say the slam sent Brad into a boozy tail­spin, sources say.

“Brad caught Angie red-handed, admitting that she thinks he’s a so-so lover,” said a source. “Ever since then, he’s been on a drunken rampage – consuming copious amounts of his favorite beer and red wine.”

The “Moneyball” star, 49, was even spotted staggering up to a Taco Bell drive-thru window in Santa Monica, Calif., at 1 a.m. on Jan. 18.

According to an eyewitness, Brad looked drunk, and after he real­ized the fast-food joint was closed, he stumbled off into the early morning dark­ness.

The bender didn’t stop there.

“In late January, Brad returned to Los Angeles after a brief trip to London looking groggy, grizzled and worse for the wear,” added the source.

“And he’s showed no signs of slowing down on the booze. He’s been drink­ing to forget about the image of Angie and Colin together.”

Angelina, 37, and Farrell, 36, hooked up while playing mother and son in the 2004 epic “Alexander.”

“Angie was wild back then and she was turned on by how kinky it was to be carrying on a torrid affair with her movie son,” said the source.

“At the time, Co­lin was as crazy as Angie. He was a hard partier and had an insatiable sexual appetite.”

Brad discovered An­gelina still has the hots for the “Minority Report” star when he overheard her talking on the phone to her second ex-hus­band, actor Billy Bob Thornton, said the source. “Brad left their house in Los Angeles one day in January to run errands. But he forgot his wallet and headed back home af­ter only a few minutes.

“As he walked into their bedroom, Brad overheard Angie say that he was a great guy, but Colin was the best lover she’d ever had!

“Then Angie told Billy Bob that her love life with Brad had gone cold, and she missed the wild, passionate sex she’d had with Colin!”

When the phone call ended, Brad exploded, said the source.

“Brad demanded that Angie tell him everything about her relationship with Colin,” said the insider.

“She told Brad that she fell in love with Colin because he was dangerous and spontaneous. She also copped to sending Colin sexy pictures, dirty voice-mails and sexually explicit let­ters during their fling. Angie admitted that she had hoped for a future, includ­ing marriage and kids, with Colin, but he wasn’t ready. She couldn’t deny to Brad that he was her second choice!”

The source said Angie – who’s rais­ing a brood of six with Pitt – was deliberately pushing Brad’s but­tons.

“Angie wanted Brad to catch her spilling lurid details of her affair with Colin because she thrives on making him jealous,” said the source. “It’s her way of controlling him. She believes having tension in their relationship keeps Brad on his toes, and makes him want her more. It’s her way of showing that she’s in the driver’s seat.”

Sources say Brad remains haunted by Angelina’s affair with Farrell, whose list of conquests is legendary.

COLIN HAS BEEN linked to big-screen co-stars Lake Bell and Salma Hayek, singer Britney Spears, Irish medical student Muire­ann McDonnell, English writer Emma Forrest and Polish actress Alicja Bachleda-Curus, who gave birth to his son Henry in October 2009.

Farrell also sued “Playboy” model Nicole Narain in 2006 after a sex tape of their relationship surfaced, but he’s tried to play down reports of his “big” manhood after filming a full-frontal nude scene for the 2004 drama “A Home at the End of the World.”

“I walk to a door and you see my ****, and I walk out of the shot,” he said jokingly. “It’s dark, and it’s three inches, uh, seconds long.”

The source added: “Brad has forbid­den Angie from ever contacting Colin again. She’s betrayed his trust, and at this point, he can’t even imagine going through with a wedding.”