Like Regular 'Tag' but where you have to touch some one else's genitals to pass 'it'. Really self explanatory...
"Lets play Genitalia Tag!"-Gigi
"Okay!"-Elijah
(Sam runs and taps Gigi's chest) "You're It! No tag backs!"
(Gigi then goes and taps Elijahs butt) "You're it!"
the act of slapping one's genitalia against the genitalia of another in a triumphant or celebratory fashion
most commonly in the context of sexual innuendo