What is Pear-shaped?
1.
Something that has gone pear-shaped has gone wrong: this is based on the visualisation of a plan being like a perfect circle. When something goes wrong, the plan is distorted and becomes pear-shaped.
It was all going well, then Jonno dropped the ball and it all went pear-shaped.
2.
sadly wrong, awry (usually in past tense)
Everything was going well until the afternoon, then it all went pear-shaped.
