High-hat

If she hasn't time for this or that, if she refuses to make or keep appointments, if her face does not greet all comers with a sweet and charming smile, then the word is passed around that ‘So-and-So is getting high-hat and up-stage.’

A young Chinese woman with a plait down to her waist bowed to them both and then continued cutting up the bricks of opium into smaller pieces. […] "High-hats. Five dollars a pound," he explained to Mannion, pointing to the large pills or 'pocks' that the girl held over a candle flame at the end of a long needle.

I don't high-hat technical words, because I know there a lot of things that can't be said any other way, but the doctor's lengthy explanation simply boiled down to this, that[…].