(well,) imagine that! spoken
Used to express a surprise or astonishment, particularly in response to the information which has been recently revealed.
He has been awarded the Nobel Prize for literature. Well, imagine that!
Her grandfather made a recovery after undergoing a tricky operation. Imagine that!
To be surprised by some sudden occurrence
To greatly surprise, shock, or confuse someone
To be very wet
Because of forgetting bringing an umbrella, I look like a drowned rat when it rains.