Urine

Urine, colloquially referred to as piss, was a substance that Oswald Danes claimed was put in his food in jail. Although they covered it with things like cream and gravy, he could still taste the urine, for, as he put it, "[piss] has a way of enduring". (TV: The New World)

Samantha Jones' friends Mo and Mikey Clunes were locked up overnight for urinating on the front window of Woolworths. (PROSE: Kursaal)

Somerset's genetically enchanced leopards could record information that could later be read from their urine. (PROSE: Alien Bodies)

A woman in a Cardiff shop, when questioned by the Torchwood team as they tried to track down Bernie Harris in 2007, said she "wouldn't even piss on him if he was on fire". (TV: Ghost Machine)