shit on a desk
To act upon a sudden, inexplicable, and irresistible desire to masturbate.
She decided to go shit on a desk.
did you just shit on my desk
a question asked directly after someone shits on a desk. this is specifically from southpark(like all offensive things) when cartmen shat on Mr. Mackeys desk
cartmen:*shits on desk*
Mr. Mackey:eric did you just shit on my desk?
Mr. Mackey:eric did you just shit on my desk?