Monster truck fans wear skimpy lingerie and roll around in raunchy after party pictures following Michigan Mud Jam rally

ATTENDEES at the biggest ever Michigan Mud Jam monster truck rally this weekend got down and dirty at the event's afterparty.

Pictures of the wild festivities show lingerie-clad women wearing balaclavas, monster truck enthusiasts dancing on poles, and plenty of muddy make-out sessions.

Billed as the “largest bogging event in the North,” it attracts off-road enthusiasts from all over the country - with bogging being a slang term for stinking or disgusting.

The US Sun gained exclusive access to all the wild goings on including the Royal Rumble Race and the Mud Jam Mudathon obstacle course – and all the wild partying.

For each night at the week-long rally, a DJ and a live band played at 9pm.

The live music was often accompanied by events like bikini contests, obstacle courses, and muddy competitions, according to the website.

The monster truckers take part in the series of events while contending with acres of mud as they enjoy alcoholic beverages - leading to some interesting photo opportunities.

"It's the place to be," enthusiastic attendee Mike Koepke told The US Sun.

"If you're not here this year, then you better be here next year."

Held at the Iosco County Fairgrounds in Hale, Michigan, monster truck fans partied all night - and exclusive photos capture all the action.

One patriotic partygoer stripped down to a pair of Stars and Stripes briefs and – for some reason – wore a Panda mask on his head.

A pair of bikini-clad women passionately kissed in the mud pile at the end of the obstacle course.

Meanwhile, monster trucks remained nearby and some even competed in the challenges.

One especially muddy event, the Open Mud Pit, saw the vehicles covered, top to bottom in the mucky stuff.

Other events include the Mud Jam Mudathon obstacle course, split into men's and women's events, with the female event being paired with a bikini contest.

But the monster trucks were the stars of the show, with six-hours worth of championship Royal Rumble racing involving eight teams of five trucks each.