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.