It Slipped In | Accidentally

Outside of work, the phrase is frequently used as a humorous or skeptical excuse for actions that appear intentional but are claimed to be mistakes.

The phrase has appeared in various forms of media for over a century. For instance, a 1910 socialist publication used the phrase to describe how a specific cartoon was mistakenly included in a newspaper. Xan tagged AQW Design Notes it slipped in accidentally

In many informal or comedic settings, the phrase is often used as a double entendre or a clichéd excuse in adult-oriented jokes and memes. Historical Usage Outside of work, the phrase is frequently used

It can describe receiving an item that wasn't ordered, such as a free gift from a seller that a customer initially assumes was a mistake. Colloquial and Social Contexts Outside of work