1) plural of fn (the fanny) 2)a hybrid of both genitals
'holy moley I see a field of female f noosh'
'lord all mighty you have a funny f noosh'
fn is a abbreviated form of fanny - which is considered as the bottom in the USA and the front bottom on ladies in the U of K
'That skirt is so short I can almost see your fn'
'Put your fn away for god's sake woman'
'Listen mate I don't want to compare fns'