Use 'soup up' when talking about mechanical modifications, common in car culture.

Mechanical Context

'Soup up' is informal, so it's not used in formal writings or professional documents.

Colloquial Use

Although often physical, 'soup up' can refer to any kind of improvement.

In creative contexts, 'soup up' means making stories or plans more captivating.

Be cautious with 'soup up' not to imply dishonest exaggeration in serious matters.

Use 'soup up' for making something more enjoyable or engaging to the audience.