lay down life
lay down (one's) life
To sacrifice one's life (for someone or something); to die (for a purpose). Our soldiers are out there laying down their lives for our freedom, and we should show our support. To lay down one's life to save a stranger is the ultimate sacrifice.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
lay down one's life (for someone or something)
Fig. to sacrifice one's life for someone or something. Would you lay down your life for your country? There aren't many things for which I'd lay down my life.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.