The Sao song

I’m a member of the Blackheath Rotary Club but tonight I attended the meeting of our neighbouring club, Central Blue Mountains. Professional entertainer Pat Drummond is a member of the other club and unknown to me, it’s traditional to finish their meeting with Pat performing an item. Tonight it was “the Sao Song” which must be sung with a Sao in the mouth!
Now there may be some blippers out there saying “what the hell’s a Sao”. Well, it’s a 60mm square savoury cracker which originated in Australia over 100 years ago and as far as I know, has never escaped our shores. Needless to say, singing with one in the mouth while playing the guitar is a rare but dubious skill!
I’ve tagged it for WW as it requires a wide set of chops to fit a 60mm square biscuit.