This post is a direct and unorthodox reference to my own same post reply in Controversial Issues, regarding age discrimination. Anyone sending questions regarding this post should please see said reply for a more total take on the matter. Don't be afraid to read previous replies on that thread, as they are certain to convey a more complete understanding of the issue at hand.

IMHO: In my humble opinion
craic: Noun commonly used in Ireland to denote fun, revelrie, or enjoyment, as in: Where's the craic?
jammin: Adjective used by some Americans to denote positivity in some venture, whether future, present or past, as is:That party was Jammin'.

What it really comes down to is, I think that we can all learn from one another, regardless of age or background. The language will change at all times, and if we make an effort to keep it standardized (or standardised) we'll communicate on a more lucid level. But no matter how entrenched you are, Homer Simpson's D'Oh is still in the OED. We might as well ride the wave and not become calcified.