Livvie is the name of someone who loves to speak alot on facebook, acts retarded and tends to be mentally challenging for those who are more intellectual than them. They also tend to share a passion for fat dogs that do not belong to them.
Livve: *Pops up on facebook chat* YOOOOO WHats up broo!!!! Im a turtle!!!! give me your dog Bubba!!!!
Victim: Ummm, why are you so mentally challenging Livvie? and no you cant have Bubba.