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 hip people 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.