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1.
The act of 1) leaping or jumping off a stage after horribly failing at acting or missing a line, 2) throwing an actor off the stage for doing either of the above things
1) During the middle of the performance, the actor playing Hamlet tripped on stage and after standing up and seeing the audience laughing at him, he committed stagicide.

2) the stage crew took revenge on the actor playing Hamlet, by stagiciding him during the last performance.
by Anna Pine March 07, 2011