What kind of punishment do you get for exposing your bum in public? In quebec canada, and over 18 years old.

Not sure of Canada but in NY state public lewdness is a class B misdemeanor which carries a potential jail sentence of 90 days and something like a $750 fine or more

My friend got α citαtion when she did thαt αt the jαzz festivαl

A lot depends on the why and how.

Where they exposing thierself to small children in the park,
Or merely using the bathroom behind a building.

In a yard, to people over the age of 18

Perhaps drinking involved?

Most likely a fine and a lecture from the judge

Were you arrested?

What is the charge?