When one encounters a "Nofundo" while accompanied by friends of any gender, they must say "Nofundo" and make the hand motion described below. Not doing this is a violation of the guy code section 4.A.XIII, paragraph 8, line 6.
Arms must make a crossing motion and head must be turned side to side as if saying "no". Very similar to the "You're out" motion.
Guy A: What kind of disease do you you think she has?
Guy B: No need to be rude, man.
Guy A: You're right... Nofundo (Does the aforementioned motion)