ear hustle
When someone is too curious and sneaks in to hear what other people are saying, even if they're not asked.
I was at the mall and heard my crush talking to my ex. Ear hustle, baby.
My mom was eavesdropping on my brother and his friend. She knew everything.
I was in the kitchen and heard my dad talking about my allowance. I was like, 'you're gonna regret this.'