Kylie Jenner Shades Blac Chyna, 'Black Widow B*tch' Diss: Chris Brown 'Flirting' Amid Tyga Heartbreak, 'New' Girlfriend Rihanna Livid?

Blac Chyna won't stop until ex-boyfriend Tyga's relationship with 17-year-old Kylie Jenner crumbles. But the "Keeping Up With The Kardashians" beauty continues fighting back, and she's even designated Chyna a vicious new nickname!

An alleged insider for HollywoodLife.com reveals:

"She calls her the Black Widow... I don't know who came up with that nickname, whether it's her or Tyga, but that's what they both call her." 

Pretty intense - Urban Dictionary provides this thorough (and rather amusing) definition of the shady phrase:

A woman with a female "savior syndrome" that dates people in a bad place, then builds them up as "Mr. Perfect" until he grows stronger and asserts himself as a man, but still loves her. Once the Black Widow knows her pray is built up as a man, she crushes him no matter how much he loves her because she wants to feel like someone needs her and that she is responsible for everything he has. She feels inclined to make people perfect to compensate for their own flaws and in turn makes herself a controlling manipulative b*tch. She will date people that are douchey or in a low place - so watch out if your heart is for the taking. "She will eat you alive."

Well, this explanation sort of disses Chyna AND her former "Rack City" lover! But do MstarsNews readers agree that's how their troubled relationship works?

But despite the nonstop drama, 25-year-old Tyga and Jenner have yet to call it quits. In fact, the YMCMB rapper left his younger muse under the watchful eye of hip-hop pal, Chris Brown!

Breezy wants Chyna to leave the aspiring fashionista alone. While Tyga tours overseas, the "Loyal" crooner and Jenner continue hanging-out (a lot). Now - would THEY make a cute couple? How scandalous would that be!

Rumors suggest that Breezy's getting "back together" with on-and-off again sweetheart, Rihanna. Hopefully RiRi doesn't team-up with Tyga's baby mama to embark on another epic feud against Jenner - maybe she should just stick with Drake!