'Jersey's' Sammi -- Off Hook for Punching Ronnie

She coldcocked Ronnie with a HAYMAKER on an episode of "Jersey Shore" -- but Sammi Sweetheart ain't facing the same fate as "Teen Mom" Amber Portwood ... in fact, she's off the hook completely ... for now.

It was a pretty shocking promo for this week's episode -- Sammi slugs Ronnie across the jaw during an argument ... an act of violence nearly identical to the thrashing Amber Portwood unleashed on her baby daddy just a few months ago ... the same thrashing that landed her behind bars.

As we previously reported, Amber was charged with felony domestic violence over the on-air beatdown -- but according to the Chief of Seaside Police, Sammi won't be prosecuted whatsoever ... at least until Ronnie decides to press charges.

Calls to Ronnie's rep weren't returned -- but seeing as the footage was shot last summer, we're guessing he's moved on. Meanwhile, Amber still faces three years in prison.

'Jersey Shore' Stars Sammi and Ronnie Call it Quits

The self-proclaimed "sweetest b*tch you'll ever meet" and the archetypal juice-head gorilla have finally called it quits. No more holding hands during couple's spray tanning sessions or fluff and fold fodder for "monogamous" couple of 'Jersey Shore.'

After dating on-and-off throughout the 'Jersey Shore's' first three seasons, according to Entertainment Tonight, Sammi Giancola and Ronnie Ortiz-Magro took to Facebook to make it official. Sammi threw the first punch when she began 'unfriending' all of Ronnie's friends from her Facebook page--although her Facebook profile shows no sign of a yay or nay 'Relationship Status.'

We all watched the roller coaster romance unfold during season one of 'Jersey Shore' --Sammi and Ronnie's first lip locking session was caught on film just minutes after Sammi had been caught in a tongue twister with the couple's roommate, The Situation. And with season two in Miami came a Miami dose of temptation--Ronnie was caught in a three way kiss while girlfriend, Sammi, was snug in bed back at their shared pad.

Although neither of these tanner than tan shore go-ers are picture perfect examples of monogamy, we did think there was a leopard print themed wedding in their future. On the show, which just kicked off its third season, Sammi and Ronnie are still very much a couple. We can't wait to see the downward spiral caught on film.