Rob Kardashian Steps Out Showing Major Weight Loss As His & Blac Chyna's Hygiene Plunges — Inside Their Smelly Home

Rob Kardashian and Blac Chyna are all about showing their healthy strides together — and his new weight loss photos prove it — but the stripper-turned-model is still leaving a bad taste in Kardashian mouthes.

After her Jan. 29 arrest for public intoxication and possession of a controlled substance, it was only a hint at what Rob, 28, and Blac, 27, were really doing behind closed doors as a new couple.

"They lose entire days bringing on drugs and alcohol," a source told Star. "It's worse than anyone could imagine."

Plus, the new love birds aren't too concerned about cleaning up after their wild days. "Dishes pile up, trash cans overflow with garbage and empty liquor bottles. It's disgusting," the pal said of the couple's smelly L.A. living situation.

Blac Chyna even leaves her hair extensions all over the apartment, the source added, and sometimes Rob will skip showers for days.

"All Blac Chyna wants to do is have a good time, and Rob is more than happy to keep the party going," the insider said.