Does anyone speak Portugese? What does this word mean?

My mom’s side of the family has a heavy Portugese influence, which is highly food-oriented and everyone’s always trying to feed everyone. When you decline an offering of food, the people on this side of the family say, “mashfika”, which supposedly means “more for me”.

I wanted to look this up, but either I’m way off on the spelling or this word doesn’t exist, so now I’m intrugued. They pronounce it like mahsh-FEE-kah.

Is this a word and if so, how the heck do you spell it?