Another excuse for Americans to spend an entire day eating

When you are flying in the coach section of an airplane and one or both of the other two seats are unoccupied giving you more room, to stretch, lean or lie down.

When a commercials audio is much louder than the program that you actually want to watch's audio.

Infamous, now viral, phrase uttered by John Tyner of Oceanside after refusing to be subjected to an airport body scanner and subsequent thorough pat down.

Can also be used in any social setting where you just want people to stop bothering you with uninteresting things.

Alerting your friends and co-workers when someone nearby has just farted.

"coming out of the cupboard" is a figure of speech for popular or non popular people's disclosure of their secret obsession for Harry Potter.
The term comes from the well know phrase "coming out of the closet" which refers to a person revealing that they are gay/lesbian.
The "closet" part is replaced by "cupboard" because, as we know, Harry Potter lived in the "cupboard under the stairs" in the beginning of the book series.

The TSA airport screening procedure.