Topping The Sundae
The (possibly sexual) act of vomiting on a partner's genitals. Usually an accident, and always played off as one.
I tried tossing the salad, but I ended up topping the sundae.
Cherry topped sundae
Used to describe a sexual act wherein a male partner lays on the ground and jerks himself off, while his female partner stands above his head and waits for him to bust on his own face, before proceeding to allow her period blood to drip on top, creating the proverbial "cherry-topped sundae".
"I was on my rag, so Flowrida asked me to give him a cherry topped sundae, instead of the regular rusty trombone routine."