Hair that obviously belongs to a person's crotch that is overflowing from their bathing suit. If the person is wearing a speedo, then this hair can flow in from the sides. When there's enough of this hair it resembles bangs, but instead of being around someone's face it is around their man or woman junk instead.
Check out the hairy dude in the speedo.
Yeah his pubic bangs are tight, bro.