Definitions by P.Shiz in the house.

Keep it Hyphy and Underground 

A phrase used by East Coast skimboarders, this reflects the attitude of people that are just trying to have a good time. It involves keeping what you do on the down low while also being rambunctious and having a lot of style while you are throwing down your moves at the beach

Guy 1: Here come some Bitties

Guy 2: I'm gonna throw down and keep it hyphy and underground so maybe they will give me their numbers later.

Keep it Hyphy and Underground by P.Shiz in the house. July 27, 2010