The art of putting different food coloring colors together to make a rainbow color and by using a funnel pouring it into a girls anus or vagina and having her shoot it out.
Man 1 "Yo dude last night me and Megan were Nyan Catting." Man 2 "Aw man that's awesome!"
Similar to playing regular horse shoes except the bar is a mans erect penis.
Man 1 "Ah my dick hurts man" Man 2 "Why? what happened?" Man 1 "Me and Jessica were horse shoeing last night and let's just say she's good at it"