What does slammerific mean?

"Slammerific" is a playful, informal word that combines "slam" and "terrific" to describe something incredibly good, fantastic, or awesome.

It emphasizes the powerful impact or positive feeling something gives you, just like a slam dunk in basketball.

It's a slang term, so you wouldn't use it in formal writing or serious conversation. It's more likely to be used in casual settings with friends or in social media.