Risk life and limb
Definition 1 of 1
Pro Tip 1/3Extreme Danger
Use when someone risks being seriously hurt or killed, not for small threats. 
The stunt performer risked life and limb for the movie scene.
Pro Tip 2/3Heroic Actions
Often used for people who willingly face danger to help others or for a cause. 
Medics in war zones risk life and limb to treat the wounded.
Pro Tip 3/3Emotional Impact
The phrase evokes admiration or sympathy for the person taking the risk. 
She risked life and limb to rescue the animals from the shelter during the fire.