These people were complaining that what God had provided for them was not enough. They complained so much they became a burden to their leader and drove him to complain to God about how much of a burden their complaining had become. They all asked for meat because the manna was not enough.
So God, tired and angry at all the complaining, gives them the meat they asked for. He gives them so much meat it is going to come out of their nose. Getting more than we actually need will hurt our bodies. God is giving them what they asked for, but so much that it is going to hurt.
This is a punishment for rejecting Him as all they really needed.
Be careful what your heart and mind greedily wants. When is enough not enough for you? When is God and his love and his provisions not enough for you?
Our greed reveals how little we trust God, and I fear I trust God far too little.