"aggressive gas fees" in the context of cryptocurrency, particularly in networks like ethereum, refer to unusually high transaction fees that users pay to ensure their transactions are processed quickly. gas fees are the cost required to perform a transaction or execute a contract on a blockchain, and these fees are paid to miners or validators who process and validate the transactions.

aggressive gas fees occur when there is high demand for network resources, often due to a surge in transactions. in such cases, users may choose to pay higher fees (i.e., set a higher gas price) to prioritize their transactions over others, ensuring faster processing. this competitive bidding for transaction space can lead to "aggressive" fees, where the cost becomes significantly higher than usual.