Gut feeling - кишкой чую.

Gut - кишка, кишечник и иногда брюхо.
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Go with your gut - to make a decision based on feelings - положиться на интуицию, чувства
▫️ The number of people who go with their gut is large enough to influence the outcomes of elections.
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Gut feeling - a feeling that you are certain is right, although you can give no good reason why
▫️ Beverly had a gut feeling there was something seriously wrong.
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A beer gut/belly - пивной животик
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Bust your gut - надрываться.
▫️ I busted my gut to get into law school.
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Have the guts - have the courage to do sth
▫️ He doesn’t have the guts to walk away from a well-paid job. (не хватает духу)
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to work/cry/run your guts out - to do it very hard.