a dime - Dropping a dime means you’re a snitch. You’re probably gonna

Dropping a dime means you’re a snitch. You’re probably gonna get beaten up for it.

I dropped a dime on my friend. He got in trouble and I got beaten up by his brother.

My mom dropped a dime on my brother. He got sent to the principal’s office and I got grounded.

I dropped a dime on my crush. He got in trouble and I got a broken nose from his brother.