This is where I came in

This is where I came in.

Fig. I have heard all this before. (Said when a situation begins to seem repetitive, as when a film one has seen part of before reaches familiar scenes.) John sat through a few minutes of the argument, and when Tom and Alice kept saying the same thing over and over John said, "This is where I came in," and left the room. The speaker stood up and asked again for a new vote on the proposal. "This is where I came in," muttered Jane as she headed for the door.

See also: came, this