Satan's Waterfall 

A woman's menstruation

Gabi was really irritated at the world because of Satan's waterfall.

Satan's Waterfall by dil3mma April 24, 2015

Satan's Waterfall 

Satan's waterfall is another word for having your period. This is referred to satans waterfall because satan means evil and hell (basically what a period is) (oh and because satan normally associates with the colour red like a period) and waterfall means the constant flow of blood.

"we all have satan's waterfall today" says Emily to her friends
"ik our periods hurt like hell" says emily's friend

Satan's Waterfall by B E L L E October 20, 2020

Satan’s Waterfall 

When you let a girl urinate on you while she’s on her period.

Damn! You look like your girl got yo ass with Satan’s Waterfall!

Satan’s Waterfall by Wholefatmilky May 2, 2021

satans sacrificial waterfall 

Literally just a girls period.

Is satans sacrificial waterfall gone yet?

satans sacrificial waterfall by Yeahnahyeah May 12, 2016