Runny Babbit by Shel Silverstein
Way down in the green woods
Where the animals all play,
They do things and they say things
In a different sort of way-
Instead of sayin' "purple hat,"
They all say "hurple pat."
Instead of sayin' "feed the cat,"
They just say "ceed the fat."
So if you say, "Let's bead a rook
That's billy as can se,"
You're talkin' Runny Babbit talk,
Just like mim and he.