Betty: Look at that Rolex watch! It's only $50. I will buy it for my boyfriend.
Ted: Don't be a sucker! It's obviously a fake. It'll break in 10 minutes.
Sucker - English slang for someone that is easily tricked or very gullible - someone that believes things very easily.
I am not always believes things easily but sometime it is happen to me. to believe.. so I am sometime a sucker... :)
I think it happens to all of us now and then. If we learn from the experience then we won't be a sucker next time!
You are right! Thank you.