A particularly tasty activity which consists of bringing a plastic or metal drinking straw into a public washroom, inserting the straw into an unflushed toilet bowl or urinal, and drinking whatever is in it. Bethesda's Fallout series makes use of toilet sipping in the form of in-game health regeneration with the option to drink from toilets, urinals, sewage tunnels, etc. However, you will not gain extra health or energy by toilet sipping in reality, in fact you will lose health and energy at an alarming rate and likely die in a week.
Person 1: "Eugh, what is on your breath? Don't tell me you've been toilet sipping again dude, you know that shit'll kill you."
Person 2: "Trust me, that holy nectar is worth every risk."
Someone who enjoys the copious oral consumption of urine, usually by a gallon over a short period of time. They may drink their own urine or that of their significant other in a sensual manner (usually only if the urine is clean, although in some cases, such as toilet sipping, the consumer may be at risk to disease). Pissguzzlers are not to be confused with piss fags, as Pissguzzling is a hobby based entirely on flavor variety rather than sexual desire, however it can become a sexual activity very quickly if one is not cautious.
Ah, It is always a pleasure to meet a fellow Pissguzzler of such standards.