Nonsensical rubbish spoken by thick celebrities duped into believing they are warning against the dangers of child-abuse when really they are warning against the dangers of their own stupidity. From UK TV's Brass Eye. Example: Child-abusers smell of hammers and share more DNA with crabs than humans is an example of nonce-sense. Phil Collins actually said, I am speaking nonce-sense on national TV and still didn't realise he was being duped.
NONCE-SENSE
Meaning of NONCE-SENSE in English
Slang English vocab. Английский сленговый словарь. 2012