Stands for "Las Gangstas Bonitas", which means, "The Pretty Thugs". A popular all-girl gang in Northern Michigan. You have to be asked to join. And perform certain tasks WELL. If you refuse the offer, you will never get another chance. These LGB girls do NOT play around. Get on their bad side, and you will be sorry.
"Man, did you hear what the LGB girls did to Mac's girl?"