The action of chilling on a back porch (borch) usually involves alcohol and/ or other illegal substances. Borching is usually preformed by the borch cr3w members: Sydney, AllySON, Michele, and Brittany.
Three teenagers are just taking a cruise in the Kota. Owen spots out a group of dirtballs, Kyle rolls down the window and yells BORCH at the dirtballs while driving by. (The act of Borching someone)