Skuntch is a hybrid word which combines three words into one. It is the great-grandmother of all female disses, and though there can be male skuntches (pl); a vast majority of skuntches (pl) are female. The three words the word skuntch is derived from, skanky cunt bitch, combines the three adjectives into a singular noun; henceforth the word skuntch.
Skutch (rhymes with "butch") is NOT an ebonics word (don't know where they got that idea from) and definitely does NOT mean "slut" or anything like it. It means "pest" and has been used for several generations by Italian-Americans. It comes from the Italian word, "scocciare" (pron. skoh-CHA-reh)which means "to bother or annoy".
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.