A dick in the pudding
A tiny, smelly, annoying mess that turns a good time into a nightmare; like a turd in the soup, a dead rat in the cereal, and a used sock in the lava.
My mom's neighbor started a band and it was a dick in the pudding
That test was a total dick in the pudding
The pizza was a dick in the pudding because it had pepperoni, anchovies, and a hair