[From 15 secs]
Wheres Jeff? is he on the inside?
Wheres Jeff? is he playing out wide?
Theres Jeff, he will brush you aside!
Jeffrey, Jeffrey, Jeffrey, Jeffrey, Why yi yi yi
Jeffrey, Jeffrey here, Jeffrey, Jeffrey there,
Jeffrey, Jeffrey, Jeffrey, Jeffrey, Jeffrey, everywhere,
Jeffrey, Jeffrey here, Jeffrey, Jeffrey there,
Jeffrey, Jeffrey, Jeffrey, Jeffrey, Why yi yi yi
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Not sure this would work as a chant or not. Leader does "Wheres Jeff/Theres Jeff" bits? Or forget the first verse and use the first two lines from v2 and repeat. Just ideas, could be amusing though.