Expression used here and there by Some People
This is an informal, joking way of saying "what's up" or "how are you?". It's a way to ask what's happening in your life or in the situation, as if something in your life or the situation is "crackalacking". Crackalacking is a fake verb, and usually pronounced with a funny accent and with an -in ending instead of -ing. The term is never used seriously.
"What's crackalackin'?" "Haha not much."
Added May 2021 by anonymous