A 'Melt' is a term used to describe
someone who is often clumsy, or silly. A 'melt' is
a special kind of 'doofus' (but not completely stupid, as that would be rather mean).
Ryan: Eshara, what number are you on now?
Eshara:
You don't have my number saved? Gosh, Ryan, you are such a melt.
Ryan:
What does that mean?
Eshara: It means
you are a special kind of doofus.
Ryan: Oh I see. You are so wise Eshara.