It is the end and the DRYEST part of the bread. You eat bread when you are punished - You eat the end piece of the bread when you are severely punished. To eat end piece, is to be a disgrace to the world.

A swimmer

End Piece is the person on the end of a multiple person cuddle. Requires 3 or more participants where the people on the middle are middle pieces and the ones on the end are end pieces.