Supposedly Alexander the Great went to visit Diogenes in a suburb of Corinth to see what his deal was. When Alexander asked if Diogenes wanted anything from him, Diogenes reported replied “yes, move, you’re blocking the sun.”
Afterwards, Alexander was so amused and impressed that he’s quoted as saying “it I were not Alexander, I wish I were Diogenes.”
Fucking awesome.
In this case I’m pretty sure it’s a play on “coomer,” given the masturbatory nature of the referenced mentality
Edit: clarification + link added