bird in (one's) bosom(redirected from bird in bosom)
bird in (one's) bosom
obsolete An oath of faith, servitude, piety, or conscience that is kept guarded in one's heart, mind, and spirit. Truly, my lord, I am at your service and loyal to your name, and I shall guard the bird in my bosom till my last breath.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.