Lactanal
Shoving a milk bottle, or any dairy item, up your backside like it’s the last day of school and you’re trying to end it with a bang.
I did lactanal during recess and now my pants are ruined.
He did lactanal with a whole gallon of milk and now he’s the king of the school.
She did lactanal in front of the whole class and got a standing ovation.