Fsn

What is Fsn?

acrynom for Fat Slag Nan.

someone's nan who is fat, and was a slag in her youth.

Dave: Did you hear about Jonny's nan the other night?

Bill: Yeah, shes such a fsn!

See nan, slag, fat, nilf, youth

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Quarter-shot

1. When you think you have a fart and you let it out, but it is a little wet and it gets on the back of your pants. The spot is about the s..

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Fsn Edit Meaning