When a male hits puberty; the balls become saggy when puberty comes, thus they 'drop'
Yo! Did you hear Joe's voice? I guess his balls dropped...
Or
12 Year old squeaker : Hey guys wanna go play some Minecraft on Xbox?
13 Year old Non Squeaker: Shut up dude! Your balls haven't even dropped.
By Adan
Balls Drop
When a boy reaches puberty. During puberty, the penis grows larger and longer, and the testicles enlarge and grow hair. Before puberty, a boy's scrotum will be on the penis. During his puberty, the boys scrotum will enlarge and hang off his body more.
"Hey, has Mitchell balls dropped yet?"
"No, he ha not hot puberty yet and his balls are still close to his willy
When your underwear rides up, so you’ve gotta drop it low real quick. You may think that the added theatrics of this move distract from the fact that your package is getting mummy-wrapped by your 100%-cotton christmas cat boxers. But really, it just looks like you’re trying to lay an egg.
This is the third time since Memorial Day that he’s blown out the crotch in his white chinos. Dude’s gotta lay off with the ball drop.