Being figuratively allergic to the incessant lieing of individuals that are obviously making blatant falsehoods.
In other
words: Knowing a bullshitter and his or her bullshit when you see it and effectively showing your
dislike of
said bullshit and or bullshitter.
Guy: I never dated that nasty
whore.
Girl: -Sneezes-
Guy: You okay?
Girl: -Laughs- Oh I'm fine, I just suffer from a very serious case of Bull Shit Intolerance.