Dwarf Gekkos are small, bipedal robotic units from the Metal Gear series, best known from Metal Gear Solid 4 and Metal Gear Rising: Revengeance, where their chirping, almost childlike noises contrast sharply with their role as combat machines. That contrast is why clips of their laugh circulate on meme soundboards and in gaming edits, usually detached from gameplay and reused as a reaction sound. Because the laugh is under a second long, it works as a quick punchline, and it remains popular with Metal Gear fans who recognise the sound instantly.