The act of urinating in complete darkness while in a bathroom, attempting to locate the toilet or disregarding it completely.
The next time your in the mall, picking up your dad from jail, or at loved one's home enter the bathroom and shut off the lights. Unzip and let it go. That's a mystery piss! You did it!
The next time your in the mall, picking up your dad from jail, or at loved one's home enter the bathroom and shut off the lights. Unzip and let it go. That's a mystery piss! You did it!
by PISSFACELARRY April 6, 2011
by Tractor Tom December 21, 2017