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2.
When you eat something which is delicious and yet maliciously bad for you.

A combination of the words delicious and malicous.
That In and Out "Animal Style" Cheeseburger is Melicious.

Homer Simpson would say, "These donuts are MMMMMMMMMMmmmmmmmelicous."
by Trepid May 04, 2010
 
1.
A person whose name contains 'Mel' who happens to be rather desirable. An amalgamation of 'mel' and 'delicious'.
–adjective 1. highly pleasing to the senses, esp. to taste or smell: you are melicious.
2. very pleasing; delightful: a melicious body.
–noun
3.Nickname or term.
-prounoun
by Mel-icious May 28, 2007