The act of having intercourse with a woman who is menstruating , while both partners are in a plastic bag, so that blood pools at the bottom of the bag. The blood filled bag is afterwards referred to as the "ketchup packet"

A portmanteau of carpe diem, a Latin phrase that means “Seize the Day!” and DM, which stands for Direct Messages. This word means seizing the day via DMs.

The act of wearing a condom and having sex with a woman who is on her peirod, then taking the condom off and making her squeez the menstral blood in to her mouth, as if drinking ketchup form a packet.

Widely believed to have been invented by Sir Isaac Newton after a detailed study of male sexual arousal, the ketchup packet involves the caressing twist of a man's testicles until they burst. Often, the scene can resemble a McDonald's after a five year old threw a ketchup packet against the wall. A 2005 survey estimated that over 9000 American males have had their testicles surgically reattached so that they could once again experience the joy of a ketchup packet.

When your girl is on her period and you squeeze her so blood comes out her vagina.

When your trans-male boyfriend is on his period.

A discarded bloody tampon or pad