A guy and a gal kiss after he performs oral sex on her during her period.
After they kiss, the gal says, " Go brush your teeth, your have menstrual mouth"
Usually initiated by the guy, an act and symbol of relief that one's lady friend is menstruating and thus, not pregnant. For example, if your girlfriend is on an oral contraceptive and you decide to pull the goalie for the season, one may start to worry that the pill may not be 100% effective. In this instance, one is excited when that time of the month comes and upon hearing of Aunt Flow's visit, a menstrual high-five is warranted.
Guy: hey babe, this party blows. Wanna sneak into the laundry room and fuck on their dryer?
A mentrual flow that has passed its expiration date and has become rife with mold, bile and excretory chunks.
I tried to eat out Michelle, but her lack of hygiene, combined with the time of the month, resulted in my getting a mouthful of curdled menstrual chunks.