boils my beans
Something minute that angers you extremely badly, but is no big deal.
boils my beans: Something that REALLY pisses you the fuck off, but is not really important in any respect.
"gosh, it really boiled my beans when I had to wait 3 minutes for my food at taco bell."
"gosh, it really boiled my beans when I had to wait 3 minutes for my food at taco bell."