1 definition by J.T. Falls

Top Definition
A sexual move, were one takes a sip of a blue slushy and spits it out into his or her partners vagina and/or butthole, providing an excelent cool sensation.
Cameron: Dude, I just gave Blair a blue john, she came instantly
Max: Yeah, that's typically a crowd pleaser. I bet her vagina was all blue after words.
by J.T. Falls September 08, 2011
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