What is Marvy?
1.
An abbreviation of marvellous. "Marv" can be used in a similar way.
"Wow, your party on Friday was truly marvy!"
2.
Used in the Georgia Nicolson books. Refferig to something being marvellous
Omg, thats a marvy idea!
See
3.
adjective; short for marvelous; works especially well if you are extrememly enthusiastic
"What a great day! The sun is shining, the birds are singing - simply marvy!"