Fourth wall

The Fourth wall is the idea that the performers should ignore the idea that they are performing.

Breaking the Fourth wall is when there is a nod to the fact that the performers are performing, but then continuing as if they hadn't. For example, Deadpool breaks the fourth wall by slipping into a conversation that it seemed like the studio cut the budget during filming.

Tearing Down the Fourth wall is when a performer drops the pretense that they are not performing. For example, Rick from Rick and Morty addressing the audience while ignoring the other characters.

No Fourth Wall means that the performer never acted as if they weren't performing.