Define The 4th Wall Meaning

The 4th Wall
Something the villain (or hero) deadpool does alot

So deadpool jumps out of your screen and shoots you yo dead bitch!
Brought to you by deadpool,the fourth wall breaker
Publish this and deadpool won't break the 4th wall and kill yo ass
By Louisette
4th Wall
The wall (in theatre) that is seperating the crowd and the actors. it is usally broken when the actors interact with the crowd.

Bob: what do you guys think?
Steve: Bob, quit breaking the 4th wall!
By Babara
4th Wall
A metaphorical wall that characters in any media break by talking to the player, watcher, reader, etc.

Todd: Why do you love Deadpool so much?
Howard: Mostly because he always breaks the 4th Wall.
By Talya