Spycrab comes from Team Fortress 2, the class based shooter released by Valve in 2007, where the Spy class crouching and walking sideways while looking up made him resemble a crab. Players turned the accidental pose into a running joke, filming peaceful Spycrabs migrating across maps and refusing to fight. Clips and edits spread through YouTube and gaming forums, and the laugh clip was later lifted for soundboards and meme edits. It remains popular because it captures that harmless, taunting side of TF2 humour in a few seconds.