To show utmost sincerity and loyalty; to reveal one's true feelings or intentions without reservation.
面对挚友的询问，他沥胆抽肠地把心中的秘密全都说了出来
Facing his close friend's inquiry, he revealed all the secrets in his heart with utmost sincerity.
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To show utmost sincerity and loyalty; to reveal one's true feelings or intentions without reservation.