A common description of a canine behavior, exhibited when a dog hears an unfamiliar or enticing sound. Upon hearing such a sound, many dogs will tilt their head to one side in a questioning manner.
Master: Who's a good boy?
Dog: *baroo?* (tilts head to one side)
Master: Are YOU a good boy?
Dog: *baroo?* (tilts head to the other side)
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.