Often preceded by "Get 'em."
person B) "Get 'em MacBeth!"
person A) "Wish me luck."
person B) "You can do it man, get 'em MacBeth!"
This play is often referred to as the "M-word" or "The Scottish play", "The Unmentionable" or simply, "That play", if it is necessary to make reference to it.
Anyone who utters the word must step out of the dressing room, spin around three times, spit, and recite the line "fair thoughts and happy hours attend you" (from The Merchant of Venice) and beg on their knees to be let back in.
Jake: No!!! You can't say that word!
Shannon: Hahaha! It is so fun to mess with you. Macbeth! Macbeth! Macbeth!
Shannon: oh, shit.
Jake: Told you so...
Shannon: Shut up.