A Park Avenue interior designer turned her golf swing into a serious weapon at a swanky Hamptons country club — shanking a golf ball that wound up clocking another female club member, a lawsuit says.

Bonnie Salkind, 67, of Great Neck, LI, was heading toward her cart near the first hole of the South Fork Country Club in Amagansett when she was suddenly struck by the flying missile, she claims in court papers.

Rafaela Romanowski, 56, a Manhattan resident who runs a Midtown interior design shop, didn’t look to see if anyone was around before she hit the ball, and “should have been aware and taken precaution so as to prevent injuries,” Salkind claims in her Manhattan Supreme Court lawsuit.

Romanowski said she knows Salkind, but otherwise declined to comment.