The idiom "if it had been a snake, it would have bitten me" means that something was very close to you, but you didn't notice it. It's like saying that you were looking for something, and it was right in front of you the whole time, but you didn't see it.
The idiom comes from the idea that snakes are often hard to see, and if you're not paying attention, you might not notice one until it's too late and it bites you. So, if you say "if it had been a snake, it would have bitten me," you're saying that you were so oblivious that you didn't even notice something that was right in front of you.
You can use this idiom in many situations. For example, if you're looking for your keys and they're on the table right in front of you, you could say "if it had been a snake, it would have bitten me." Or, if someone is trying to point out something obvious to you, and you finally see it, you could say "wow, if it had been a snake, it would have bitten me."
Overall, this idiom is a fun way to describe a situation where you were so unaware that you missed something obvious.
• I was searching for my phone in my pocket, and it was there all along. If it had been a snake, it would have bitten me!
• I missed the bus even though it was right in front of me. If it had been a snake, it would have bitten me!
• I was looking for my glasses, and they were on my head the whole time. If it had been a snake, it would have bitten me!
• I had been struggling to find the solution to the problem when it was right in front of me. If it had been a snake, it would have bitten me!
• I couldn't find my keys in my bag, but they were right in front of me. If it had been a snake, it would have bitten me!
• I was looking for my passport and found it in my bag. If it had been a snake, it would have bitten me! I would have never noticed it.
• I couldn't find my keys this morning, but they were on the kitchen table. If it had been a snake, it would have bitten me!
• I spent hours searching for my passport, but it was in my travel bag. If it had been a snake, it would have bitten me!
• I was searching for my glasses all over the house, but they were on top of my head. If it had been a snake, it would have bitten me!
• I was trying to figure out the meaning of a difficult word, but it was in the dictionary the whole time. If it had been a snake, it would have bitten me!
• I was trying to find the solution to a math problem for hours, but it was right there in the textbook. If it had been a snake, it would have bitten me!
• I was looking for my phone in my bag for ages, but it was in my pocket the whole time. If it had been a snake, it would have bitten me!