“Give someone the third degree” means to question them with great intensity, often in a way that feels relentless or intimidating. The expression is American in origin, and its meaning is documented around the turn of the 20th century. That period is the earliest reliably established point for the phrase in this sense; the precise moment, speaker, and event that produced it are unknown.
The wording soon became associated with police questioning. In early 20th-century America, newspapers and popular accounts used “the third degree” for forceful interrogation, sometimes involving pressure or coercion. It was a vivid label, not the name of a formal legal procedure. As the phrase entered everyday speech, its reach widened: people could give a suspect, a visitor, or even a friend the third degree simply by asking a barrage of searching questions.
Several explanations for the “third” have been proposed, but none is firmly established as the phrase’s source. One points to Freemasonry, where the third degree makes a member a Master Mason. That degree does involve a ceremony and instruction, but the connection to police interrogation remains speculative; similarity in wording is not proof of an origin. Another theory links the expression to legal systems that classify crimes by degree. Yet those classifications do not, by themselves, explain why intense questioning came to be called “the third degree.” The evidence supports the early 20th-century meaning more securely than either origin story.
The expression now commonly describes persistent questioning without implying that physical mistreatment is involved. “When Maya came home an hour late, her parents gave her the third degree about where she’d been.” “The reporter gave the mayor the third degree about the missing funds.” In both sentences, the phrase adds a hint of pressure, whether the questioning is serious or merely uncomfortable.
The phrase endures because it turns a familiar experience—being pressed for answers—into a concise image of interrogation.