Wombo Combo
A Wombo Combo is possibly the most recognizable competitive Smash video, referring to a California Tournament with commentary by HomeMade Waffles, Phil, and Mango.
It was "accidentally" created by SS/Tang and used on Zhu, who was playing as Fox. The original move itself was by using a constant grab release, until a final three-hit move of Reflector, Up Smash, and then a Knee Smash. A video of the original Wombo Combo can be seen here.
The combo has since become very popular, mainly due to the video's humorous reactions, coining such phrases as "That Ain't Falco!", and "Get Yo Ass Whooped!". The sound has since been applied to other combos where it is usually coupled with the commentary to make the combo seem more "epic" or to give it humor value. It also has been humorously contrasted to other "epic" things in the world, such as the Wombo Combo series by PakmanOnCrack or even non-Smash related things. It is currently seen that the most related video to a song is the Wombo Combo, from possibly all of the references.
Other forms of Wombo Combos
Wombo Combo 2
A later satire of the Wombo Combo by SS and Tang vs. Phil + Falcomist on Corneria which had a large 19 to 86 exactly after HMW said "Wombo Combo" again. The video can be seen here.
Wombo Combo 3
The third Wombo Combo was with SS/Tang vs Shroomed/D.P at the Battlefield (the same stage as the original Wombo Combo). This combo can also be referred to as the happy meal, since the commentators talk about the happy meal and rubbing fries in someones mouth and other Mc Donalds related stuff. Link is right here
The UGS Combo
Commonly considered the European version of the Wombo Combo, done by Smasher:Armada (Peach) and Smasher:Aniolas (Sheik) vs ironically Falco on Battlefield (referencing That Ain't Falco from the original video). Around a day later, a Wombo Combo audio version was made to fit this scene. Both videos are quite popular. [1]