What does hoot and shout owl is about mean?

The phrase "hoot and shout" owl refers to an expression used in the United Kingdom to describe an occurrence that is unlikely or unexpected. It originated in the 19th century when owls were known to make distinctive hooting sounds, while shouting was associated with loud and unexpected outbursts. The phrase suggests something both unusual and attention-grabbing, like an owl hooting and shouting in a setting where such behaviour is not typical. In contemporary usage, it can also be used in a humorous way to describe an exaggerated or over-the-top reaction to something unexpected or surprising.