Scott Disick was in a feisty mood on Saturday night, getting into a scuffle with a stranger at Meatpacking restaurant Catch. After hosting a Sweet 16 at Marquee in the afternoon, the baby daddy of Kourtney Kardashian headed to Catch with Kourtney’s brother, Rob. Both were flanked by three large security guards, but an unidentified man started taunting Disick as they waited downstairs for the elevator. Words were exchanged between Disick and the unknown guy, who screamed, “Stop trying to be Armenian!” at the nattily dressed Disick (the Kardashian klan is of Armenian descent). Spies said some “pushing and shoving” erupted, and the argument grew so heated that security had to pull the guys apart. Rob and Disick continued their night upstairs, where they ate and drank in peace. Disick is opening his own Meatpacking restaurant called RYU with Chris Reda, formerly of The Griffin, and Fatty Crab’s Jesse Camac. A rep for Disick didn’t get back to us.