Mad Menace

Growing miffed that this chiller is fluff
The big stiff, looking ill, snarls "enough!"
He's unsound and can't take it
So he'll pound it and break it
That is, IF the guy still has the stuff.

The Monster (Glenn Strange) is mad and can't take it anymore--"it" being Abbott and Costello Meet Frankenstein (1948). It's a joke.