something you say when someone lies to you, cheats on you, betrays you
john: i love you anna.
anna: don't piss down my back and tell me it's raining!
by J-Lima December 31, 2009
Get the don't piss down my back and tell me it's raining mug.
When a man tucks his penis and balls in between his legs so it is pointing out of the back (similar to the "goat" or silence of the lambs tucking), you then back up to a urinal, bow forward and piss out the back.
I was so drunk at the game last night that I decided to drop my pants to my ankles, turn around and do some back pissing in in the urinal.
by b4dub March 26, 2013
Get the back pissing mug.