The act of eating out your favorite hoochie while she is on her period. Usually this is performed (but not limited to) while she is on all fours, while the guy/other hoochie is upside down tonguing near or around the bung.
Desperate skeez: "Come on baby, just let me eat dat fine puss."
Hoochie: "But I'm on my period foo..."
Desperate skeez: "That's alright, I'm always lookin for a tasty cherry turnover."