Might it be easier if we just make the definitive list of what is NAFF?

[KingRolo]

Fascinators
French rolls
Boden Mac

but not floor length skirts

and

T shirts with cartoon characters on

gold sovereign rings or those ones that say 'MUM' on them

Oh yes any jewellery with names on "mum" "dad" "brother" "dog" "uncle twice removed" "postman". Naff.

i see even Topshop do a wolf top now

Does that make it ok then?
Er... no.

Agree with most of the above especially the huge freaky gold clowns dangling from the necks of ladies.
hate to see anyone covered in cheap looking lots of gold jewellery.
Also strappy tops straining at the chomp on very large women, especially when showing lots of mismatching bra straps underneath.
Trousers that show the tops of thongs or underpants.
Hair pulled back tightly in a ponytail, especially when it needs washing.
Men in too tight shirts that reveal their hairy fat beerbellys through the straining buttons. Indeed anyone wearing clothing at least one size too small.

Also parents who wear clothing with so and so's mum/dad emblazoned across the front, usually found at sporting events such as football or dancing competitions.