A descriptive word, usually negitive directed towards anyone who's adopted this MTV disposible lifestyle as a culture.
If you wear a XXXXL white t-shirt, and you're not a teenage girl at a slumber party, that's gnuck. If you ARE a teenage girl at a slumber party and you have the words cute, sexy, or grab me printed acorss the ass of your sweats, that's gnuck. If you put 22 inch spinning rims on a minivan, that's gnuck. If you're a white kid with corn rows, that's gnuck. If you're a 30 year old rapper living in the basement of your parents, that's gnuck.
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.