The masturbation one has to resort to in order to relieve sexual tension when one's female partner is menstruating and either unable or unwilling to partake in vaginal sex. Usually refers to a solo act but can also refer to the hand relief supplied by the menstruating partner.
1. I say, darling, as you're on blob this week any chance of a Ragtime Shuffle? I really need to shift this dirty water off my chest.