A series of meaty beneathies
Putting a passed-out person on a skateboard and sending them flying under someone who’s doing a bunch of little, squishy poops. If there’s at least three squishy poops, it’s a 'series', if not, it’s just a 'meaty beneathy'.
My mom pooped on me three times while I was on a skateboard under her.
My brother got hit with three squishy poops while I rolled him under my grandma.
I was under my teacher as she pooped three times like a tiny, angry pig.