Wiktionary
piss up
n. (alternative spelling of piss-up English) vb. 1 (context idiomatic transitive English) to screw up, make a mess of 2 (context idiomatic intransitive English) to blunder, to make a mistake
Usage examples of "piss up".
I've filled her ass with jism, and feeling as I do I'd like to piss up her ass too .
If the mother were rash enough to interfere during these scenes he would give her a clout and tell her to go piss up the end of a rope.
Now hold still so I can sniff your crotch, piss up your leg, and otherwise act objectionable.
I told him to leave you the hell alone, and he told me to piss up a rope.