Normal sex when Male is on top of a Female *dancing* the night away. It is usually in the bed but as long as the girl or the guy is laying on top and both are lying down, it can be called "Horizontal Happy Dance"
Got it from a Legend of Zelda parody on Youtube.
Link:hey do you want to do the horizontal happy dance with me?
Random Hotel Girl:Sure! I love to dance!
Link: Ok, your really gonna love it!
Random Hotel Gilr: wait.....
Link:hey do you want to do the horizontal happy dance with me?
Random Hotel Girl:Sure! I love to dance!
Link: Ok, your really gonna love it!
Random Hotel Gilr: wait.....
by Fightingdreamer77 April 8, 2011