YANTBOM
Text message shortcut for "You Are Not The Boss Of Me". Used when someone is being bossy or telling you do to something you don't want to do, or it's not their place. Like after you've moved out of the house and mom is still trying to tell you how to live your life.
Mother (to adult child): "You should call your sister and apologize"
You: "YANTBOM!"
Mother: "What does THAT mean?"
You: "Look it up in the Urban Dictionary!"
You: "YANTBOM!"
Mother: "What does THAT mean?"
You: "Look it up in the Urban Dictionary!"