A combination of my nickname and surname.
'Goo' was given to me after a primary school exercise where people had to tell everyone the strange words they used for everyday things at home. A pal said he called a cigarette a 'singoo'. At the time I was just referred to as 'Mason'. Since the first syllable of the nonsense word sounded just like the last syllable of my name, some wag tacked them together and started referring to me as 'Masingoo'. This was shortened to 'Goo' and has been my name every since.
Funnily enough, if you look up a Scots dictionary, you'll see 'goo' referred to as 'an offensive smell' - which ties in with my tremendous capacity as a veggie to produce copious quantities of pungent intestinal gas...