When you have the balls, you are brave enough to do something the average joe wouldn't be brave enough to do. Usually, males challenge other males to do something by asking If they have the balls to do it.
Balls can also mean something spherical commonly used in sports.
Joe:Yo, I bet you dont't have the balls to hug that girl
Chadson: Watch me.
Joe: Damn, you've got balls.
Balls-
it's something you put in your mouth
i put damon's balls in my mouth
In your pants attached to you small PP
Look at his balls there so tiny LUCAS