I heard the phrase "it pissed me up" couple of times with the same meaning as "it pissed me off", but I cannot find this idiom in any dictionary.
Does this idiom exist? And if it does, is there any difference between the two idioms?
In British English we use 'get/be pissed up' with the meaning 'get/be very drunk', but I haven't heard it used to mean 'pissed off'.
It really pisses me off when there are a lot of people drinking beer and I don't get any.
I've heard people tell others to go piss up a tree.
I am an American and I've never heard that. If I did hear that it would sound awkward. In the US we say "I'm pissed." or "I'm pissed off." to day that we are angry. I believe that in England to be "pissed" can mean that you are drunk. In the US that expression hasn't caught on in terms of meaning that you are drunk.
From my experience learning languages, if you can't find an expression on google it is not used very often.
ESL Lessons and Exercises for English Fluency by Drew