What does "squish in" mean? Is it common to use "squish in" as this meaning?
"Squish in" has a similar meaning to "squeeze in," which means to fit more of something into a limited space. For example, this could mean trying to find a place in a crowded subway train, or perhaps trying to pack many things into a small suitcase. The speaker has used this expression to indicate that she had to put in effort to make space for extra guests at the party, as the number of place settings that were prepared was not enough. Ex: I'm trying to squish in more stuff into my backpack, but it's already too full. Ex: I squeezed onto the crowded train.