someone who swims in a chlorinated pool so often that their hair becomes an ugly shade of yellow and becomes all wirey. They also occasionally grow moles out of differant portions of their body (including the penis) but does not get acne all over the places of cheeks, forehead, or the genitals.
colby is a swimmer. he has a swimmers penis, everytime he turns around you can see his yellow pubic hair.
Colby swims so often that he got ugly yellow swimmer hair.