What to do when you owe a bunch of dough to your baby mama? Go shopping, of course!

Tyga and Scott Disick hit up Barneys in Beverly Hills yesterday for some retail therapy, and the rapper didn't seem too concerned about the fact Blac Chyna totally put him on blast for not paying child support earlier in the day. The former stripper accused T-Raww of being a broke deadbeat, sleeping with dudes, and a bunch of other stuff, and now we're learning the real reason she's so pissed.

Apparently, BC thinks her ex and her newest ex Rob Kardashian are talking sh*t about her after striking up an unlikely friendship, and she's not happy, TMZ repots. She thinks Rob told Tyga that she's interested in getting back together with him, when in reality she's just trying to contact him to get cash for their son King. The problem? Rob is still in contact with Chyna, and tells her all about their bro talks. Is he stupid?!

The one hit wonder better put a ring on Kylie Jenner's finger before she realizes he's a total loser!