When you go to an outing or party and
there are only males there or if there are many males and few females.This can also mean when a bunch of gay men go out or get together somewhere it is called a sausage-fest because they are all playing with each other's "sausage"
Hey, man did you go to paul's party last night, yea it was a total sausage fest. Hey look at those homos steven and dillon over there, they look they are going to have a sausage-fest
a party of only guys (or at least 80% guys), where there is a substantial abundance of weiner.
Benji told everyone he was a pimp and was bringing 50 hot bitches from Arizona State to his house Saturday night. But when we got there it was just a bunch of dudes watching "The Matrix". We blew that bitch right away and never went back to that wanksta's crib.