Adjective. Mixture of the words "Yucky," and "Funky." When something is disgustingly bad, especially in regards to food or smell. Yucky + Funky = Yunky
Around the table during a Holiday meal:
Tina screws up her face and spits what she was chewing into a napkin. Her Mom asks her if she's ok because she looked like she was going to vomit or choke.
Mom: Baby, are you ok?!
Tina: Omg Mom, don't touch Aunt Flo's cranberry relish pie, it's so yunky!
Mom: Sorry honey, some people really should not be cooking.
Two guys walk towards a food truck & quickly swerve and stroll.
Martin: Hey Mike let's go check out that Tofu Turkey Taco truck.
Mike: (sniffs) Oh hell no! Do you smell that yunky mess?