noun. semenema. pronounced semen•enema is exactly what it says, an ass full of semen to fill you up; and either you get plugged, (usually by your mistress/domme with an inflatable buttplug, until she decides you've been full long enough.)
Or, just flushed
up your ass by the cock the semen is
ejaculated from. And then it drains out between him, and
the next guy in line to give you one. (Depending on your position.)
Oh my god, I need to go get a lot of semenema's!!! I love being filled up with semen, and stuck that way, when Mistress inflates my buttplug! She keeps all that semen
inside me for hours, until my bloodstream absorbs as much semen as possible, and
I love it!!!