Secondary Shit
Right when you finish taking a huge shit, and you believe that no more shit could possibly come out of your ass, you stand up to either pull your pants up (or wipe if you stand to wipe), and you have to sit right back down again because another piece of shit just showed up.
"Dude you were in there for like 30 minutes!"
"Yeah I know, I had 3 secondary shits"
"Yeah I know, I had 3 secondary shits"
Secondary Shit
The shit you have to take later in the day because you didn't shit enough shit during your primary shit.
Hang on honey dinner smells amazing but work was busy and I need some time to take my secondary shit.