Self courtesy
A courtesy flush done for the sole purpose of saving one's self from the smell of their own defecation, usually done in a private restroom when you are alone in the dwelling or in a shared/public restroom during a time in which multiple occupancy of the room would be highly unlikely.
That marinade on that steak really affected me, the stank was so bad that each time I crapped I had to do an immediate self courtesy to prevent myself from either passing out or puking.