until the pips squeak

Etymology
Originally coined by the First Lord of the Admiralty and Unionist election candidate in an election promise to "squeeze the German lemon until the pips squeak", made during a speech in Cambridge on 10 December 1918 and reported the next day by the.

Phrase

 * 1)  Until the maximum amount has been extracted.

Usage notes
This phrase is usually, but not always, used with the verb.