When a person or persons, especially one in a position of authority, has been controlled or unduly influenced, by another person, group, organisation or entity.
When a private message is made public in order for one of the parties of the message to be chastised or humiliated by a group of people.
Posting instant message conversations in which one of the persons has ;owned' the other party making them seem ignorant so others can mock them as well.
John Doe was quite upset when the entire forum teased him because Jane Doe puppeted their cyber chat.
While our lifespan is the number of years we will live, our healthspan is the number of healthy years we will have and our sexspan is is the number of years we will continue to be healthy enough to continue having an active sex life.
A lighthearted reaction upon receiving disappointing news of some sort. Usually something that isn't a particularly a big deal, esp. when it primarily affects someone else - sort of a mild schadenfreude. Sometimes doubled or tripled, and possibly said in a sing-songy voice for added comedic effect to imitate a muted trumpet, which is how the meme originated.