Muskrat up your butt

Posted by R. Berg on January 10, 2004

In Reply to: Muskrat up your butt posted by victor on January 10, 2004

: In this novel I'm reading I found the following question by one of the characters:

: "Are you a local peacenik with a muskrat up your butt about the military?"

: Can anyone tell me its meaning? Also, is it a spiced-up version of a more common expression, like 'to have a rat up one's... ' or something similar?

: Thanks a lot!

About the same as "chip on your shoulder."