For my own part, I always thought it was Zeus pissing into a sieve.
"The Eleven Comedies"
Aristophanes et al
A man were better twenty times be a bandog and bark, Than here among such a sort be parish priest or clerk, Where he shall never be at rest one pissing while a day, But he must trudge about the town, this way and that way; Here to a drab, there to a thief, his shoes to tear and rent, And that which is worst of all, at every knave's commandment!
"Gammer Gurton's Needle"
Mr. S. Mr. of Art
No doubt, at various times, pissing over, he had seen the barren hill and its flanking lake, but had never given them a second glance.
"The Passing of Ku Sui"
Anthony Gilmore