“De” rhymes with “they”. A little more emphatic with each repeat. Use gestures.

De moose, de mooose (de moose, de mooose)

Swimming in da wata (swimming in da water)

Eating his suppa (eating his suppa)

Where di' 'e go? (where di' 'e go?)

He go… to… sleep (He go… to… sleep)

Repeat several times; end with:

Dead moose, dead moose

Floating in da wata

Not eating his suppa

Where di' 'e go?

He de… com… pose…