Something that could have been told in a more concise way but is dragged out because the teller doesn't know how to tell a story. It's a play on the annoying clarifier, "Long story short," people use to sum up a digression, which really never seems to be that short anyway. So instead you say the opposite.
So I was walking into the store the other day, I wanted to get some aspirin because I had this massive headache and I walked down aisle four but they only had Tylenol but that doesn't work and I went to the counter and short story long this guy was holding up the store!
A feeling of both frustration and building rage, usually around someone you want to be nice to but also feel like wringing their necks, like family.
When my grandmother called me for the 15th time that day to ask how the internet works ("where does it go?") I was feeling such frustragesion that I quickly got off the phone and shouted into my pillow.