Ball Print
When you're too tired or drunk to make it to the bathroom and you piss in the sink. When you're done, your balls have left a print on the counter, sink edge or another surface ... showing the tell-tale sign of you using the sink as a urinal.
Stan must have been drunk off his ass last night. When I went into the bathroom, there were his ball prints all over the sink. Dude must have had a lot to drink. The sink smelled real nasty, too.