Comes from the term Sausage Fest, but the Slu Fest involves several slu's in one area hanging out with each other.

Slu, deriving from the word slut, is used to add a nice flow to the statement

Joining a slu fest can be a good time but also dangerous, you never know the slu's you will be dealing with.
"Yo man look right down that hill, is that what i think it is?"

"YA MAN THATS A FUCKING SLU FEST, LETS GO!"
by Svvagaarr November 13, 2011
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