UBK 

Unnecessary Black Kid: An African-American kid that shows up to basketball intramurals usually wearing their P.E. uniform and some kind of chain. A UBK's sole purpose is to mess up every drill they participate in and make everybody else's experience unenjoyable.

I hate when those damn UBK's show up to practice. All they do is piss me off!

UBK by ThugJuice October 12, 2010

UBK 

Union Beach Kids: A group of savage kids living in Union Beach. Leader of the UBK is the Rubi who is often fingering his cat at home. Second in command is Rcal, then Tterra. If you come to Union Beach, Nj. Prepare to meet the UBK.

Yo Nick i almost got jumped by tha UBK.

UBK by DEPAINN November 11, 2006