“What is a sausage party?”
It is a pejorative for men.
A party with an abundance of men?
I guess she insults her fan base that makes her rich
No it’s just a term for a party with too many men. Generally used by men.
Bro 1: “this party sucks. There are no women.”
Bro 2: “yeah, it’s a real sausage party.”
(That’s from an Israeli book on American English idioms. As a non native speaker, I carry it around.)