He may be a low-down, dirty dog, but Khloe Kardashian still loves to bond with baby daddy Tristan Thompson over a fast-food burger!

Khlo and Tristan hit up the McDonald's drive-thru Tuesday afternoon, as they were enjoying their first trip back to Los Angeles following the birth of daughter True two months ago.

We can hardly believe Khloe stuck it out in Cleveland this long, especially given Tristan's cheating right before the birth of their baby girl. She must have been dying to run home to mommy Kris and her sisters, but she endured ... and now she's probably hoping the couple that indulges in junk food together, stays together.