The arse has it as MILEY incurs “Hunger Games” fiancée fury for daring to bare butt!

CHEEKY Miley Cyrus upset her future mother-in-law by parading around in “rear-vealing” cutoff shorts – and now her engagement to “Hunger Games” hunk Liam Hemsworth is in jeop­ardy, say sources.

The 19-year-old pop prin­cess and her  fiance had a “huge fight” over Miley wearing miniscule white denim short-shorts, confided a close friend. The outraged actor even blasted her as “a tramp” after the me­dia published sizzling photos showing her bending over in the outfit.

Miley went too far,” said the friend. “The sad thing is that Liam warned her about wearing the der­riere-exposing white denim shorts before.

“He’s furious with her because his mom Leonie freaked out over the photos.

“Leonie is a very conser­vative teacher and the pictures were too much for her. She informed Liam she was very upset and wanted him to tell Miley.

“She doesn’t want the future mother of her grand­kids walking around with her bottom hanging out.”

Liam, 22, and Miley met on the set of “The Last Song” in 2009 and have had an on-again, off-again relationship for the past three years. And now her shorts seem to have short-circuited Liam’s pa­tience.

“He told her she looked like a tramp,” revealed the friend. “She was defiant, say­ing that she can’t be blamed if somebody wants to take shots of her.

“But when she found out Leonie was unhappy, it mat­tered to her. She realized that since she’s engaged, her actions affect other people, especially Liam and his family.”