Implied consent

Okay, imagine you want to go to a friend's house to play. You need your mom or dad to drive you there in their car. Normally, your mom or dad will ask you if it's okay to drive you to your friend's house, and you say "yes." That's called "express consent," which means you said "yes" out loud.
But sometimes, your mom or dad might not ask you out loud if they can drive you. Instead, they might put on their shoes and grab their car keys, and you know that means they're going to drive you to your friend's house. That's like "implied consent." You didn't say "yes" out loud, but you knew what was going to happen because of what your parents did or the situation you were in.
Implied consent is when someone doesn't say "yes" out loud, but it's assumed that they give permission for something because of the way they act or the circumstances they're in. In grown-up world, this can happen in things like medical emergencies when the person can't talk and it's assumed they would want to receive medical treatment.