
Jack up
Market Trends
Used when discussing economics or market changes, indicating a strategic or forced increase.

During the peak season, vendors often jack up the prices.
Negative Connotation
Often implies frustration or disapproval when prices are raised unfairly.

Customers are upset because the store jacked up the price of milk again.
Caution in Usage
Avoid using in formal writing, as it can be seen as too casual or colloquial.

I was surprised to see my bill had been jacked up without notice.
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