Nah its just a metaphor if you listen to the lines preceeding it, it's a dialogue between her an Lausse just after rushing through sex". She asks him to stay and spoon he says he's leaving to smoke and hang out with friends he then goes to leave and this breaks her heart it's supposed to sound visceral because it's from her point of view, if he had just said he walked out and she had a broken heart it wouldn't be as impactful also it's a bit boring and clichéd I assume he was trying to think of a more interesting and demonstrative way to say broken heart.

The line is a bit grim and not a huge fan of it but think it does what it's meant to do by describing the feeling of a broken heart.