xereptitude
Xereptitude is where someone with xerulence compounds the effects of that condition by mis-timing their fart releases. For example, just before the office hottie (who they have been trying to catch alone by the photocopier for months) comes around the corner and walks straight into their just released cloud of gas and is forced to make a hasty retreat, eyes smarting from the awful smell thereof.
Oh man, I had one brewing so I went over to the photocopier to let it go and just as I did that stunning blonde from the 4th floor walked up to me and straight into it! She didn't hang around, that's the end of my chances there, total xereptitude!