Whip (someone or something) into shape verb phrase
To change someone or something into the good condition that you would like
She successfully whipped her body into shape after giving birth.
Can the new president whip the economy into shape?
To become better
Try to avoid to change something because doing something else could make things worse
Rapidly or quickly; rapid increase, progress or development
As a person's power increases, his or her sense of morality lessens.
The verb "whip" must be conjugated according to its tense.
The origin of this idiom is not clear.
1. Doing something extremely well
2. Behaving in an extreme or remarkable manner
1. Holly was in rare form during her speech, so she got the first prize in the competition last night.
2. Corrine: I'm going to buy Christmas presents for everybody. Do you want to go with me?
Laura: Oh...My kids are in rare form today, so I cannot go with you. Sorry!