1.) To mudturtle (or mudturtling) is a sex act in which someone goes down on a woman at
the tail end of her period, when
it's all brown. Derivation: the reptile,
Mud Turtle, which lives alongside swamps and lakes.
2.) It can also refer to the final phase of a woman's period, in which the endometrium is drying up and brown.
1.) Man: Hey baby, mind if I
go downtown?
Woman:
If you don't mind mudturtling,
I'm down.
The act is referenced in the comedy song "Mudturtle" by Purdy Hölsom.
2.) "My period is almost over; I'm mudturtling."