It is because his name! Carmelo ... in US, only great athelet deserved to be called by initials, like KG, TD, CP3. Back in Syracuse, fans call Anothony Melo, plus he got a very sweet smile. Then chinese reporter translate Melo to 甜瓜, then somehow became 麵瓜.
The way he play, nothing related to 麵瓜.
He is one of the best from Syracuse!