Kim Kardashian SLAMS Kourtney As The 'Least Exciting To Look At' In New KUWTK Clip! WATCH!

It appears “bitchy” Kourtney Kardashian is rubbing everyone the wrong way!
In the clip from this Sunday’s KUWTK season 15 premiere (above), Kim Kardashian and her older sister GO AT IT while trying to plan the K-family’s annual holiday card shoot.
WATCH!