Top definition
A legal defence to accusations of theft, popular in the somewhat down-at-heel South Wales Valleys town.
The defence consists of 'It wasn't nailed down, your honour.'
The defence consists of 'It wasn't nailed down, your honour.'
'I drank one of Rob's bottles of wine. I intend to use the Merthyr defence - wasn't nailed down, was it?
by The Moai April 11, 2005