Brandon Dempsky, 38, of 105 Saugatuck Ave., was charged with disorderly conduct Saturday at approximately 9 p.m. following a dispute with his girlfriend at Longshore Club Park, police said.

The argument escalated when Dempsky threw a cup, which allegedly hit the woman in the back, police said.

Dempsky was released on a written promise to appear Monday in Norwalk Superior Court.