Pishie-Poshie is a substitute for whatever, non sense

Pishie-Poshie is a word 'cause I say it's a word. 'Cause that's totally how it works!

a restroom or bath room... basically anywhere you would make pishie (pee).

Refers to a person who repeatedly urinates on public transport.

"full pishy" is when someone uses extreme measures when not being able to handle a joke also know as taking a hissy fit or "going full pishy"

to go to the bathroom to pee or urinate.

To go #1 on the numerical potty chart

a penis that smells like urine

A shit day. It’s drizzly but not quite pissing it down.