Morning Mariennetta

When a guy wakes up in the morning and heads to the bathroom for the morning piss. The “morning mariennetta” is the set of farts that accompany the first morning piss.

First person: What you doing?
Second person: just woke up
First Person: you hungover from the party last night?
Second Person: yeah, my stomach is killing me, just got up for my morning mariennetta and it stinks.