What does the idiom "Spill the beans" mean?

• To spill the beans (idiom): 
English Meaning - Share a secret or reveal information prematurely / To let secret information become known. 
Bangla Meaning - যে তথ্য জানানো উচিত নয় তেমন তথ্য ফাঁস করা।

- Example Sentence - We’ll all be there at 6 for the surprise party – now don’t spill the beans! 
তাই সঠিক উত্তরটি হচ্ছে - To reveal secret information. 

Source: 
1. Cambridge Dictionary. 
2. Accessible Dictionary by Bangla Academy.