Oh dear friend, it is most definitely not to be hip! I don't want to need to ask my almost 24 year old what some things mean. But you have grandkids and raised amazing children who are there parents, therefore you really don't need the UD. Guess what I learned through an accidental flipping the channel off of ESPN. It's not good. Please share with your kids. It's NJ, therefore it is definitely meant for you to share. I call these God Winks.

http://www.njfamily.com/20-Teen-Texting-Abbreviations-Every-Parent-Needs-to-Know/