Chipmunk'd literally means a song that is "chipmunked", that is made to sound like being sung by Alvin and the Chipmunks, when really it's not. Can be usually made buy editing pitch in WavePad or Audacity. They are free softwares, just so you know.
Donald: I always hated Nickelback! But, wait... Wow, this sounds nice! Chipmunk'd FTW, ORIGINAL PWND!!!