Definition of "facetious"

Glamour for its own sake is not something I have ever been particularly interested in,” Stella McCartney said backstage after her catwalk show. Which could sound like a facetious statement from a fashion designer who was, at that moment, standing among the marble-slabbed floors, elaborately frescoed ceilings and giant chandeliers of the Palais Garnier opera house, where the show was staged.

2017 October 2, Jess Cartner-Morle, “Stella McCartney lays waste to disposable fashion in Paris”, in the Guardian‎