so romantic it makes you want to vomit; sickeningly sweet (romance)
Slang expression used to describe overly sweet, cloying romantic situations or dialogue that feel nauseatingly sentimental. Often used humorously or critically among young people.
That couple's flirting is so sweet it makes you want to puke.
This love story is full of lines so sugary they make you sick.
The phrase literally means 'to the extent of vomiting sand,' evoking the image of something so disgustingly sweet that it feels like you're throwing up sand. The exact origin is uncertain, but it likely emerged from online or youth slang as a hyperbolic expression for cloying romance.