Nelly’s flip turned out to be a flop … so he’s unloading this Missouri mansion to finally 86 it from his real estate portfolio.

The “Hot in Herre” rapper has put this Wildwood, MO home on the market for $599,000 … 19 years after he purchased the home. The plan was to remodel it and flip it with a contractor friend, but those plans never panned out … so it’s been sitting empty for years.

At this point, we’re told Nelly just wants out. Whoever gets it is getting a steal. The house is definitely a fixer-upper but it has tons of potential. The 6-bedroom, 7-bathroom crib sits on nearly 12 acres of land with vast outdoor recreation space, which, BTW, includes a private basketball court.

It’s located just 30 minutes west of St. Louis and offers stunning views of the Meramec River Valley. It’s got good investment written all over it.