Wiktionary
pee off
vb. (context idiomatic slang sometimes humorous English) Euphemistic variant of piss off.
Usage examples of "pee off".
Not only had she taken care of Scottie all of his life, but Pa and Russ and Nicky, when they were drunk, were just as likely as not to pull it out of their pants and take a pee off the front step as they were to use the toilet.
He'd probably spent most of his mar-ried life being waited on hand and foot, and my guess was he took household chores for granted, as if the elves and fairies crept in at night and cleaned pee off the rim of the toilet bowl whenever he missed.