The term "lay reader" refers to a person who is not a clergyman (like a priest or minister) but is authorized to read specific parts of a church service, particularly in Anglican or Episcopal churches.
In some churches, lay readers may also be trained to assist with other duties, such as leading prayers or helping with the organization of the service. They play a vital role in making the service accessible to the congregation.
While "lay reader" primarily refers to the church context, outside of that, "lay" can describe someone who is not an expert in a particular field.
There are no specific idioms or phrasal verbs related directly to "lay reader," but you might hear phrases like "lay person" to refer to someone who is not an expert.
In summary, a lay reader is an authorized individual in the church who reads parts of the service.