an option to buy the crown jewels offered to a white knight in order to forestall a hostile takeover

A lock-up period, also known as a lock in, lock out, or locked up period, is a predetermined amount of time following an initial public offering where large shareholders, such as company executives and investors representing considerable ownership, are restricted from selling their shares.

Everton Lock-Up, sometimes referenced by one of its nicknames such as Prince Rupert's Tower or Prince Rupert's Castle, is a village lock-up located on Everton Brow in Everton, Liverpool.

A village lock-up is a historic building once used for the temporary detention of people in England and Wales, mostly where official prisons or criminal courts were beyond easy walking distance.