When a woman on her menstrual cycle allows another individual to use his or her mouth as a strong vacuum to suck out as much blood from her lady parts as possible and spits it back into her mouth (preferably done in a drastic fountain-like exchange).
I was performing cunnilingus the other day when i had the brilliant idea to suck really hard and spit blood back into my girlfriends face. She opened her mouth at the right moment and thus the Mega Red was born.
