[SloMo6Oh]

PITA - Pain In The A**

RPITA - Royal Pain In The A**

I don't think we invented these acronyms but my father and I came up with them so we could talk about a woman who was on a multiple-day white water rafting trip with us (without her knowing).
We could just look at each other, shake our heads and say "PITA" whenever she was acting up. It helped alleviate some of the stress she caused us and kept us from tossing her off the raft.
Since then it's become a well used acronym for us and the things that fit the definition has grown exponentially.