Yumalicious is the words yummy and delicious put together.
People who are clever and silly tend to say it.
Boy: “Mmm...that tastes so good!”
Girl: “Not good, YUMALICIOUS!”
When you have nothing to do and life is shit so you speak it by saying balakshskal blah blah glah heheaaahhhh
~Gibberish~
Friend: “hey are you ok? You seem annoyed.”
You: “blah glaahhgggg eeeekkk ahaha yuaaapp ka ka ka”
Friend: “hey, I understand”