User blog comment:LastationLover5000/Fairy Tail 157 - New Guild/@comment-3061966-20121118035751/@comment-4666155-20121118044333

A crack ship is a shipping beyond all bounds of sanity. Erza and Zeref is a crack ship. SkyShipping is not a crack ship. GrayxNatsu and JuviaxMeredy are also not crack ships by the definition of the term