Sea Green Singers - Warm's Not Cool - chant/round - from Stephen Taberners Glorious Rabble.

Warm's Not Cool
women: warms (long) not cool - yip (men - short, sharp), women: warm is not cool, - yip, yip (men)
then men switch from yips to:
warms not cool, warm is not cool, warm is not, is not.
length of mens chant same total length as women: 8 bars.

Coal orOil dont dig it
Men - Oil, dont drill it or Coal dont dig it.
Woman - Leave it in the ground and try to get with it

These can be layered on top of each other (it needs 2 men groups and 2 womens)