Chrissy Teigen Defends Bezos' Fiancée Lauren Sánchez Against Troll's Mean Diss

Chrissy Teigen's standing up for Jeff Bezos' fiancée Lauren Sanchez -- this after a notorious restaurateur unleashed a barrage of venom toward ... for no real reason at all. Balthazar owner Keith McNally randomly threw up a bunch of IG pics of…