Season 8 · Episode 19
The Simpsons
Bart discovers Principal Skinner and Mrs. Krabappel kissing, and it's not long before the whole town knows of their secret affair.

Literally 'put on your pants'. Used to tell someone to stop being timid and act with courage or assertiveness. The meaning cannot be guessed from the literal words in context.
Literally 'to vary'. Used sincerely to mean 'for a change', but very frequently used with irony to imply that something is boringly predictable or always the same.
Used as an exclamation of surprise or admiration. Tone depends heavily on context: it can signal genuine admiration or mild outrage. Very common in everyday Latin American speech.
A mild expletive expressing resignation, surprise, or frustration. 'Diablos' softens a stronger word; it is not considered vulgar.
Used to dismiss or abandon something with frustration or decisive indifference. Often signals a sudden change of plan.
A fixed idiomatic phrase used to describe losing social status or reputation among peers, especially among kids or teenagers. The 'scale' metaphor here is specific and culturally loaded.
A mild exclamation of frustration or disappointment. Not vulgar; appropriate across most age groups. Equivalent in intensity to 'shoot' or 'darn'.