Sashay ?

[Andrew Allen]

Could someone enlighten us as to the origin of this term ?

I heard it first in "Dead Men don't wear Plaid" (Steve Martin) and
assumed it was some sort of parody word for 'mosey', 'wander' or
something.

Since then, my wife has come across it in a number of American novels,
hence our curiosity.

TIA for any contributions :-)

Andrew