lit. to open one's liver and drip gall; to be completely honest and show wholehearted loyalty, often used for one's devotion to a person or a cause

(literary) describes being absolutely sincere and loyal; literally "to drip one's gallbladder and lay bare one's liver"

to show someone one's innermost feelings; to be completely honest and sincere with someone

to lay open one's heart and soul; to show the utmost sincerity and loyalty