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 26, 2011
Get the Horizontal Happy Dancemug. by beautiful flower July 18, 2012
Get the happy Keanu Reevesmug. The Happy Tree Friend (Arbore amicus) generally looks like a small, anthropomorphic woodland animal with a heart-shaped nose, big eyes with pupils shaped like a pizza with a slice taken out of it/Pac-Man shape, a big mouth with buck teeth, what seemingly appears to be a line connecting the nose and the mouth, and hands that seem to switch between two forms: four-fingered hands and mitten-like hands. Of course, there are exceptions to this, for example Muta alces, which appears to be a blue, tall moose with regular-looking pupils, no nose-line, nostrils, among other things. The weird thing about the Tree Friends is that they always reappear unscathed when they die. How they do this has not been researched yet. There are many species of Tree Friends, such as Occidendum ursi, a green bear in a soldier outfit. Occidendum ursi flips out when it is reminded of war or death in any way. Normally, Occidendum ursi is friendly, but when "flipped out", seems to be an apex predator that kills anything it sees. This is the most well-known Tree Friend, and thusly when a flipped out Occidendum ursi is detected within the area of a community, the community is ordered to lock down everything.
Researcher 1: You see that Happy Tree Friend right there?
Researcher 2: Must be an Occidendum ursi.
Researcher 2: Gotta be careful, anything that is able to cause a Vietnam War veteran can trigger him.
Researcher 1: Didn't you just say "war" out loud? He could have heard you!
(The Occidendum ursi latches onto Researcher 2, pulling out a knife. Video feed cut short.)
{Seen below: An animated .gif file showcasing the "flipping out" mechanic of the Occidendum ursi, the Occidendum ursi getting ready to murder a Purpura castorea with a cake cutter.}
Researcher 2: Must be an Occidendum ursi.
Researcher 2: Gotta be careful, anything that is able to cause a Vietnam War veteran can trigger him.
Researcher 1: Didn't you just say "war" out loud? He could have heard you!
(The Occidendum ursi latches onto Researcher 2, pulling out a knife. Video feed cut short.)
{Seen below: An animated .gif file showcasing the "flipping out" mechanic of the Occidendum ursi, the Occidendum ursi getting ready to murder a Purpura castorea with a cake cutter.}
by Charuzu June 21, 2020
Get the Happy Tree Friendmug. by vontez August 16, 2012
Get the ultimate happy trailmug. A show made by Mondo Media about adorable creatures being killed in unfortuanate events that lead to their death
by Tamama2 May 16, 2009
Get the Happy Tree Friendsmug. 
Dude, i could have wrapped that chicks happy flaps around my ears last night.
Why don't you go play with your grandmothers happy flaps.
Why don't you go play with your grandmothers happy flaps.
by SlothWASMachete July 15, 2010
Get the Happy Flapsmug.