sporting blood
Willingness to take risks; spirit of adventure.
The cowboy's sporting blood tempted him to try to ride the wild horse.
The boy's sporting blood caused him to run away with a circus.
sweat blood
To be very much worried.
The engine of the airplane stopped, and the pilot sweated blood as he glided to a safe landing.
To work very hard.
Jim sweated blood to finish his composition on time.
warm one's blood
To make you feel warm or excited.
When the Bakers came to visit on a cold night, Mr. Harmon offered them a drink to warm their blood.