BUIDL is a warping word around ‘build’ just like the HODL term. The term BUIDL suggests active participation and contribution towards the blockchain and crypto ecosystem instead of just passively holding them. The idea behind the BUIDL movement is to add more people for better adaptation and improvement of blockchain.
Although it is not clear who first coined the term BUIDL. However, it stands on encouraging the development of the overall ecosystem. Even Vitalik Buterin used the term BUIDL during Ethereum’s development. BUIDLing often involves utilizing smart contracts, playing blockchain games, publishing articles, and everything else blockchain to evolve and expand.