It's like " go take a long walk on a short
pier". It would be very hard to
piss up a rope. It's also like telling someone to "fuck off" or "go get lost". A widely used term in
the 50's and 60's by men who worked in factories together for extended periods of time.
Shakey was so mad at
Ralph that he told him to "go piss up a rope". Ralph was so stupid that he actually obtained a large piece of rope and proceeded to urinate on it while it was held in a
vertical position.