Scott Disick looked seriously worse for wear Saturday after a night of hard-partying WITHOUT his baby mama, Kourtney Kardashian.

Less than a week after Breaking Celebrity News exclusively revealed that Disick's father had died, The Lord partied hard at a birthday bash for Lil Twist.

The rapper celebrated turning 21 with a party at Philippe, the upscale Chinese eatery in Beverly Hills.

Christina Milian, and under-agers Kendall and Kylie Jenner were all there.