Ah, I see... hard to find other ones.

He didn't want to be dressing down a bunch of rookies.
Seattle Times Jul 21, 2011


“Dressing up is the new cool, and dressing down is old school,” he continued.
New York Times Sep 7, 2011


It can have both the normal opposite and your unrelated meaning.

I see.."J'etais à gauche derrière" ;-)