The milk of salvation is simply that you prefer to live with Christ eternally rather die in lust in this world. As you search scripture for how to do this, we find that Christ only requires that you believe He can do this, you repent of sin, and that you forgive others, for the Lord asks how He can forgiver you if you won't give forgiveness to others.
That is the milk, the meat comes in to how we are to live as this new person in Christ. That involves the law, and there are posts after posts, most disagreeing about listening or not listening to the law.
Hebrews 6 calls walking right milk. It calls faith in God milk. It calls baptism and laying on hands milk. It calls condemnation and justification milk. These are elementary principles, not solid food.
Hebrews 5 calls the mystery of Christ and Melchezedek meat.
I think both you and luigi are wrong about what meat is. We need to see what God calls meat. Meat isn't to turn from evil and believe and follow God, doing what is right. That's basic milk. Meat isn't other people not agreeing with our questionable interpretations of things. Meat isn't judgement or resurrection, that's milk.
This is a milk question to ask, because we ought to be well beyond the point of maturity that we know not to make up our own definitions of things, but to seek and take God's definitions, but:
What does the Bible specifically call meat?