Jellyfishing

[Mark Zuckerberg]

Jellyfishing is a term used to describe a feeling experienced in two circumstances:

Post-coital jizz lingering in your vaginal passage following unprotected sex.
Whilst experiencing the heavier side of your menstrual cycle.

In both instances, usually when moving from a horizontal or seated position to standing, the [squeezy] splodge-like feeling of each substance exiting the mouth of the vagina feels like that of a jellyfish [squirming] its way out.
Note: neither can be felt whilst a tampon is in use as this stems the [requisite] out-flow prior to its exit.