The 'Sans Fortnite Dance' meme is a surreal fusion of Toby Fox’s Undertale and Epic Games' Fortnite. It typically features the character Sans performing various Fortnite emotes, most notably the 'Default Dance' (Dance Moves), often accompanied by a low-quality or trap remix of Megalovania. The meme gained traction as part of the 'cursed image' movement, thriving on the absurdity of a beloved indie RPG character participating in a mainstream battle royale trend. It is widely used to represent unexpected victory, irony, or pure chaotic energy, bridging the gap between two of the most influential gaming fanbases of the late 2010s.