Okay kiddo, so let me break it down for you.
A throffer is a mix between an offer and a threat. It means that someone is offering to do something for you, but they are also saying that if you don't accept their offer, something bad might happen.
So let's say you have a friend who wants to play with your favorite toy. If they say "hey, if you let me play with your toy, we can play a game together", that's just an offer. But if they say "let me play with your toy or else I'll tell your mom you broke something", that's a throffer.
Sometimes people use throffers in a mean or manipulative way, and that's not cool. But sometimes they can be useful in negotiations or trying to persuade someone to do something they might not have considered before.
Remember, it's always important to speak up if someone is using a throffer on you and to make choices that you feel comfortable with.