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1.
The remnant 'juice' left behind from a woman who's been on their period. Seen most often in a restroom on a toilet. Repulsive to most.
"Kaitlin! Get your period juice off the toilet!"

Dov's favorite drink is period juice.
by Kyle Bryan November 13, 2007
51 21
 
2.
The red bloody mess that gushes from a woman's vagina during her period.
Oh shit I just got period juice all over your dog!
by anonymous December 02, 2004
56 43
 
3.
vaginal secretion
oh man that chick left period juice all over the inside of her pantys
by greyden January 20, 2004
21 35