Does it go someting like:

Boy! You call me Boy?
Sixteen pounds of swingin' meat
Balls as big around as pickle jars
Enough hair on my back to weave a Navajo Indian rug
Stand flat footed and piss in the radiator of a Mac truck
And you have the outragious, audacity, to call be a boy?

Heard this in the late 60's.....from some south US gents

There is a version that goes, on and on.