Creating a bonfire inside of a small or medium sized charcoal grill on a front or back porch. Primarily practiced in urban environments due to most city's laws that forbid open fire pits.
Let's go steal some wood from that fence by the dumpster, put it in the grill, and have an Urban Bonfire.
the act of lighting a dumpster on fire, preferably in the parking lot of an apartment complex, and gathering around with your buddies and drinking beers, rosting weenies, and doing other sorts of bonfire related shit
That urban bonfire kicked ass untill the fire department showed up!