Answer: skinnydipping

AnswerCrossword Clue
SKINNYDIPPINGNude beach activity
SKINNYDIPPINGPool activity for the uninhibited
SKINNYDIPPINGBirthday-suit activity
SKINNYDIPPINGAfter-hours pool use, maybe
SKINNYDIPPINGAlternative to bringing a suit
SKINNYDIPPINGBarely afloat?