Wading through an endless field, or, still gleaning
What is the origin of the now popular phrase in the house, as in “Ladies and gentlemen, Bobby Brown is in the house”? I don’t know, but a short explanation should be added to my response. A good deal depends on the meaning of the question “What is the origin of a certain phrase?” If the querist wonders when the phrase surfaced in writing, the date, given our resources, is usually ascertainable.