The irresistible appeal of something that isn't usually enjoyable, but has a unique quality that keeps you coming back for more.
Smell this parmesan cheese, it's got that addictive funk to it.
That melody has an addictive funk.
Sneezing has an addictive funk.
Used to describe when something unconventional results in satisfaction and/or pleasure.
The chorus has an addictive funk to it.
Dry dog food has that addictive funk.