A mom, speech impaired but magnanimous
Took her son to the zoo (twas unanimous).
She asked the zoo lord
Where the fauna was stored;
He said, "Up yours, dolt, here's your damned 'animus'"

Man, that took me a long time and it was pretty weak.
But not as weak (or as interesting) as the following:

A man with a case of the hiccoughs
Cleared snow from a road with a plough.
The job made him dough
So he said, with a cough
"Hold on a sec, none of this rhymes."