Stop bothering me and/or relax yourself, specifically by taking a break in the powder room. There you can put some talcum on your face to cool off. See go take a swim and fly a kite. Old fashioned.
Richie: "I only meant it playfully."
Doanh: "WHATEVERR"
Richie: "Go take a powder!"
Polite way of saying you need to fart or leave abruptly. back in the days of newspaper funny pages or cartoons farting was commonly depicted using a poof of body powder to show they farted. this was only known by kids or hippeople so when you said it adults wouldent get it.
Well if you excuse me i need to go "take a powder" jonnysaid as he abruptly left the diner table to great amuse.