I'm fond of the W.C Fields version, which he was said to have coined when the butler came to hom while he was standing around plastered to thewto the gills, to inform him that Richard B. Mayer (of Matro-Goldwyn-Mayer) was standing at the door of the mansion insisting that Fields come to work as scheduled.

Fields pondered the situation and then replied, "Well, give him... an...evasive answer. Tell him to go fuck himself!".

"Evasive answer" has been one of my favorite circumlocutions ever since.

A