A contraction of the vagina that repeats several times per minute. In humans, the abrupt rush of air into the body of the uteris causes the vaginal flaps to close, creating a "hic" sound.
Sister term to Pussy troll, which was made famous by the movie Clerks 2. Both versions are used and mean that you cannot have sex with that person if they have a Vagina troll and or pussy troll.