defecating immediately after a person defecated previously in the same bathroom. generally said bathroom features a single toilet. however, in the case of particularly odoriferous defecators, cross branding may occur where said bathroom features several stalls. cross branding is the effect by which the two distinct odors combine to form a single, gag-inducing odor.
Guy One: I had to poo so badly that I used the bathroom immediately after Tom finished taking a dump. The distinct odors of our feces combined to form one foul smell.
Guy Two: Wow, that sounds like some serious cross branding.