heart and soul 1 n. Eager love; strong feeling; great enthusiasm. Often used with a singular verb. When Mr. Pitt plays the piano, his heart and soul is in it. John plays tennis badly, but with heart and soul. Mary wanted a puppy with all her heart and soul.
heart and soul 2 adv. Wholly and eagerly; with all one's interest and strength; completely. Will you try to make our city a better place? Then we are with you heart and soul. Mike was heart and soul against the new rules.
Compare: BODY AND SOUL.