Something that causes someone to become upset at someone else.
Elmer had an upsetity with an dirty computer.
Elmer had an upsetity with a beak in his bucket.
Elmer had an upsetity when he lost his pacemaker from releasing gas.
Elmer had an upsetity with a puddle of pee on her porch.
Elmer had an upsetity with his adjustable remote control bed.
Elmer had an upsetity with not being able to rent a tuxedo for his dead brother Charlie.
Elmer had an upsetity with his lack of hearing.