* "[the party] 100 days [before]”
Word used all the time by Everyone
n. • a prom party that it’s organised around 100 days before Matura exam (state examination at the end of high school)
"Marii nie będzie na studniówce, bo złamała sobie nogę."
"Maria won’t come to her prom party, because she broke her leg."
5 out of 10 Polish speakers have heard this