When a person engages in activities (sex, drugs or untypical behavior) frequently as if to try new things to gain experience. With sex it would be without an attachment (serious relationship) with the partners. Tends to mean prior to when a person settles down to a more conventional or platonic lifestyle.
Wayne was out "sowing his oats" all weekend at the boardwalk. Hopefully he will get it out of his system sooner than later.
A sexual act in which the female participant, wearing nothing but a whistle around her neck, gyrates her body such that the whistle swings in a circular motion during sexual intercourse.
That radio host from the town of August performed the whistle swinger using the whistle found on headmistress Umber's desk.