Put a rocket under (someone or something) Australia verb phrase
To motivate someone to do something better, more quickly or more passionately
Sometimes promises to buy toys for young children can help put a rocket under them rather than threats or reprimands.
I think you should contact the the producer and put a rocket under them. Otherwise, the products we ordered will not be able to be delivered on time.
Children or adults often say this phrase to get their friends to join in something, especially to jump into a swimming pool (pond, lake, etc.)
Act with more effort or enthusiasm
To try to achieve something or succeed in honour of somebody
Used to encourage someone to accept an invitation to somewhere.
The verb "put" must be conjugated according to its tense.