The phrase "radical shakeup" refers to a significant and drastic change or transformation in a certain situation or system. It implies a disruptive and revolutionary shift that can bring about major alterations and reorganization. Full definition
Prepare for more in the New Year, which a pretty radical shakeup of social services being lined up. (totalpolitics.com)
But if you are giving the employee task - focused comments all the time, positive and negative, the annual review becomes a non-event, and their performance shouldn't need a radical shakeup. (canadianbusiness.com)
Defining our offering to the electorate through our traditional values of personal liberty, social progression, meritocracy and a radical shakeup of the establishment - all of which I believe are at the core of Tim's beliefs - will help to make sure the public have a strong instinct of what the party stands for, why it's not a «split - the - difference» party, and why it plays a crucial role in British politics. (totalpolitics.com)