2 definition by theatreslang

Top Definition

When you have memorized all of your lines.

Girl 1: Are you off book yet?
Girl 2: No.

by theatreslang July 16, 2020

When you have to say a line but the line is not in your brain.

Backstage during a show:
Boy: You were going up back there.
Girl: Yeah, I definitely ruining the show.

by theatreslang July 16, 2020