It’s a bowel movement in a bag.

First, Gen Z started carrying around “anxiety bags” packed with essentials to calm their frazzled nerves, from fidget spinners to sour candy.

But for those that can’t imagine anything more stressful than constipation — or, gasp!, putting a bare behind on a public toilet seat — a “poopmaxxing purse” may be a No. 2 priority.

And one woman is going viral for hers, which she says is filled with things that help keep her digestion regular and her tush in tip-top shape.

Wellness influencers are promoting “poopmaxxing purses” to better support their high-fiber diets and more toilet trips.…