afterflush 

Shit left over in a toilet bowl even if you did flush.

I went to take a piss and saw Richie's afterflush and was grossed out.

afterflush by deejay2018 May 24, 2018

Afterlust 

The feeling you have when you have sex, and then hours later you still feel pleasured

He felt the afterlust of fucking cindy, even though it had been five hours

Afterlust by Archamedies616 March 14, 2019