Which is the meaning of the idiom- 'to smell a rat'?

The judge acquitted him ___ the charge. Some interesting facts about your past have just come to light. Here 'come to light' means- A person whose 'head is in the clouds' is _. 'Big bug' means 'Head over heels in love' means- To put the cart before the horse - The phrasal verb 'write off' means- What is the meaning of the phrase 'a man of letters'? cat's sleep means - 'Loaves and fishes' phrase এর অর্থ-