A fork of Rural Dictionary
The phenomenon in which a normal conversation turns blue, becoming so riddled with sexual innuendo that it's rendered nearly impossible to steer back in a non-pervy direction. Every innocent comment starts to become a dirty double entendre, until eventually the entire conversation turns into a complete smut-fest from which there is no return.
Girl: Ah, who doesn't love stripper zombies in Portland? That'd go down like Jesus on a velociraptor. Guy: I have to admit, when I first read 'go down'... I had rather blasphemous thoughts. ~ten minutes later, during which this term is invented~ Girl: Hmm, this Urban Dictionary thing is quite fun. Something for the annals of history. Guy: Two n's - one 'n' is bad. Girl: Yeah, I always thought that 'annals' was an odd word. It really could so very easily be another. Guy: Terribly easily. So, how is the entry? ...Oh, Jesus!!!! Girl: Once you go blue, you can't undo.