by SgtPeppers August 1, 2015

When two girls are having a fight and one pulls her bloody tampon from her vagina and throws it at the other.
"Did you see the fight between Donna and Jackie?" "Yeah man! Donna ended it with a crimson grenade!"
by Juggs87 July 29, 2015

When a menstrating girl is in a fight and throws her tampon at her victim. This is an attempt to stun her victim and achieve the upper leg.
by Jajoo July 29, 2015

When I was a sophomore these 2 girls got in a fight in my Spanish class and it escalated to the point where the one girl realized her best option was to take out her tampon and throw it across the room - otherwise known as 'firing the Crimson Grenade'
by Sordid Shuang July 29, 2015
