For Men Only: Old School at the Urinal?

[Alex]

I got it from a Stephen King book (have no idea if it is original) and make no claim that it was recreated correctly.

But my version reads fine to me with a slight beat between drop and goes. A pause that, when spoken out loud gives the listener a moment to realize where things are going. Adding "of pee" removes the ambiguity of it (though there may have been other syllables in the source; unfortunately I forget which book it was in).