Spartaargh is an Eddsworld short and is based on the line from the 2006 film 300 which many people have remixed on YouTube and is a very popular saying on the internet.
It starts with Edd stating to Tord "This is blasphemy, this is madness!" which causes Tord to yell "Madness? This. is. Sparta!" He drags it out for 20 seconds, causing him to start foaming at the mouth. The power of his yell almost blows Edd away and causes the Earth to shake. When he finishes shouting, he kicks Edd into a nearby house, causing an explosion.
Watch the video here