Final answer:
The phrase 'whistle up a storm' is an idiomatic expression that means to create or cause a significant or chaotic disturbance or reaction.
Step-by-step explanation:
The phrase 'whistle up a storm' is an idiom commonly used in English language. It figuratively means to create or cause a significant or chaotic disturbance or reaction. It implies stirring up a lot of trouble or excitement. The phrase combines the literal act of whistling with the metaphorical concept of creating a storm.