gauche

gauche \GOHSH\, adjective:

Lacking social polish; tactless; awkward; clumsy.

He was largely exempted from the formal socializing he said he found so hard to manage, flustered and gauche in polite company as he had always been.
-- John Sturrock, "Well on the Way to Paranoia", New York Times, July 28, 1991

He was by nature intellectual, shy, even gauche and he always believed he lacked the common touch.
-- "Editor whose legacy was diversity", Irish Times, October 9, 1999

The audience's performance was altogether more gauche, with scores of people in the stalls constantly turning round to gawp at Mick Jagger seated ten rows back.
-- Noreen Taylor, "How was it for him?", Times (London), August 3, 2000

Gauche is from the French for left, awkward.