While a pregnant Kourtney Kardashian headed back to LA to celebrate North West's first birthday with her two tykes in tow, Scott skipped it to celebrate someone far more important in the Hamptons: himself.
So his birthday was actually last month, but we all know Lord Disick loves any excuse to rage, so he hosted a belated bash for himself at 1Oak nightclub in Southampton Saturday night while Kourt was gone.
The birthday boy sprayed bottles of champagne, blew out the candles on his cake and smoked cigarettes inside the Hamptons hotspot (which is technically illegal). And while his baby mama wasn't by his side, Scott was joined by a mystery brunette in a black baseball hat in his banquette during the wild night.
Considering he and Kourtney reportedly got in a huge blowup fight recently about his hard partying ways, we highly doubt she'll be happy to see how Scott spent his weekend. And we can't really blame her...with two young kids and another baby on the way, we doubt she feels like babysitting Scott, too.