look up any word, like bukkake:
 
1.
Anyone fat, yeah... basically.
"OMG, She's hella maffy."
by BUTTERYASS DONOVAN STRAIN. July 28, 2009
 
2.
Ridicously spastic but awesome girl who is also a very good driver. This person is also a chain smoker.
That person is driving a car while spazzing and having a cigarette! She must be a Maffy!
by GNARWHAALS! January 04, 2010