An expression that expresses the seriousness of a situation and a potential terrible result if a remedy is not found. Reference to children's Christmas specials where the plot centers around saving Christmas.
Capt. Chesley "Sully" Sullenberger made a final radio call to the air-traffic control tower from his crippled jet: "We're gonna be in the Hudson" before he glided the plane into the river rather than risking a catastrophic crash in a densely populated area, saving the lives of all 155 on board.
"whose ass is it gonna be" or WAITGB is used when trying tofigure out who is to blame in a situation, usually to punish them.
Person 1: Someone robbed a helpless elderly man.
Person 2: Alright, whose ass is it gonna be?
or it can be used jokingly
Person 1: Someone leaked a major spoiler for a highly anticipated movie.
Person2: Whose ass is it gonna be?
Teacher: .... Yes... you know what? Every word I utter from now on will be on your test. And, no, I will not slow down my lectures nor will I lessen the amount of information I will continuously vomit until the very second the bell rings.