noun: a term of endearment used among friends on the early New York Hardcore (punk) scene in the early to mid-1980s, usually preceded by the words "yo, yo".
origin: derived from "Egg Bo" a trademarked breakfast sandwich from "Bojangles of America" Restaurant. The expression likely came into use on road trips to out-of-town punk shows. Hungry band members would spot a roadside Bojangles and shout "YO-YO-EGGBO" indicating a desire to stop for food.
"Yo Yo Eggbo" is also a song by NYHC band "The Psychos" featuring Roger Miret, Billy Psycho, Stu Psycho, et al.
Yo, yo, Eggbo, I'm hungry.
Yo, yo, Eggbo, that was a crucial set the Psychos played last night!
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.