DApp is an abbreviated form for decentralized application. A DApp has its backend code running on a decentralized peer-to-peer network. Contrast this with an app where the backend code is running on centralized servers.
An alternative rap band created by David McGuinness and David Rafeghello. They had many hits including: Where my hoe at? Haters and Dope, and Yo Yo Popo. Fhat Dapp is based out of toronto and they are currently taking a break.