When something is most pear shaped, it means that it has gone horribly wrong or become a massive failure. Some of the synonyms that can be used in its place include words like "messed up," " botched," "flawed," " ruined," and "disastrous." In addition to these synonyms, other related words that can be used include "misshapen," "awry," "haphazard," and "scrambled." These words can be used to describe everything from personal relationships to business ventures and athletic performances. Regardless of the context, using these synonyms can help to paint a more vivid picture of a situation gone wrong.