A person or collection of people - usually friends - who walk obnoxiously slow down school, work, or other hallways. Ranging from young, middle school students to gatherings of gossiping mothers, the walkers therein make no effort to move to the side or otherwise out of the way to allow for flow of human traffic.
"Get out of the way, you damn douche walker"
(pl.) "Those stupid douche walkers are taking up all the space"