New Zealand

While standing behind a waterfall, positioning one's erect phallus to where it is visible on the other side of a waterfall.

"Have you ever stood behind a waterfall and stuck your dick through it?" ... "It's a little thing I like to call New Zealand" (Avidan, Leigh Daniel, "Sonic Adventure DX: Monkey Business - PART 4 - Game Grumps." YouTube, co-host Arin Hanson, Jul 22, 2015)