Bruise taint
When someone lifts there ball sack and someone else smacks them on there taint (gooch).
dude last night Sandra got kinky and gave me a bruise taint
taint bruise
when riding ones bike and the seat hits ones taint, the area between the genitals and asshole, resulting in a bruise.
Rhonda was riding her bike today and had to go the doctor because she got a taint bruise.