How to Say 'I'm Jealous' in Slang English: 'I'm So Sour!'

"I feel sour." is a slang way to say 'I'm jealous' in English. It's a casual and informal expression often used among friends. You can use it in situations where someone else has something you want, like a cool new gadget or a great opportunity. For example, you might say 'I'm so sour' if your friend got tickets to a concert you really wanted to go to.