Blow your cover

Blow your cover: To reveal or expose one’s true identity or intentions, often accidentally or unintentionally.

Blow your cover is a slang term that refers to the act of unintentionally giving away one’s true identity or intentions. It is commonly used when someone accidentally reveals information that they were trying to keep secret or when they behave in a way that exposes their true nature or motives. This slang term is often associated with spies or undercover agents who need to maintain their cover to successfully carry out their mission, but it can be used in various contexts to describe any situation where someone’s true identity or intentions are revealed.

Example 1:
Person A: “I heard that Alex is actually a spy working undercover.”
Person B: “No way! I didn’t know that. We have to be careful not to blow their cover.”

Example 2:
Sarah: “I’ve been pretending to be interested in baseball to impress Mike, but I don’t know anything about the sport!”
Emma: “Just be careful not to blow your cover when he starts talking about specific players or teams.”