Popularised by the Scott Mills Show. Originally heard on the Radio 4 programme "The Archers" when an excerpt was used for the feature "Innuendo Bingo" on the aforementioned "Scott Mills Show".
Lad 2. GO ON PIGS!
While a volunteer shouts encouragement at people trying to finish a marathon "Go on pigs!".
I got no cash we'll have to goon pig it up.