At a sing around amusement was caused during the song Go and Enlist for a Sailor by the phrase 'I'll scuttle your nob'. It also appears in Elvis Costello's 'the Night Before Larry Got Stretched' with the phrase 'I'll scuttle your nob with my dodle'.

I assume it is to do with hanging or garotting but can anyone clarify please?

Thanks

Roger Kennington