Kind of a merging of both Melissa's and Dani's - when you've got a "double" chocolate bar (not necessarily a duo, I just mean perhaps bars split into two pieces/fingers, like Twix, Bounty, or Milky Way Crispy Rolls) and someone "hasn't tried it".
So they take an entire finger/piece, take a bite, hate it, "PTEW PTEW ECH URGH!" and discard it.
WH...
WHY DID YOU FEEL THE NEED TO DISCARD IT?!