Thanks to Rock Creek Rambler, we learn that Pizza Mart, home of 18th Street’s original jumbo pizza slice (or something like that depending on what pizza entrepreneur you talk to) was shut down recently for health code violations including, according to the Post’s culling of municipal reports, “debris, no certified food supervisor and unclean food contact surfaces and equipment.” If we read the report correctly, the restaurant was closed two Fridays back and reopened that…