human door chock
n.— «I have been around a while now, and in the past have seen some members attempt to operate without their mask. I usually find them right at the door to the fire area or, if they are really aggressive, about 2 feet inside the door, which is hardly effective. We used to have a name for these brothers—the “human door chock.”» —“Mask procedures that could save your life” by Fred LaFemina in New York City FireRescue1 Jan. 31, 2007. (source: Double-Tongued Dictionary)