Adjective
marvy (comparative more marvy, superlative most marvy)
(colloquial) great, awesome, brilliant
Here is another marvy glimpse into the gothic basement that I call my mind. Louise Rennison
Generally, some brands of ball pens did not increase their prices since last year except for Marvy, Avanti, and Pentel which recorded an increase by Php 1.00 to Php 6.00. Source: Internet
Some are from a cool set of Marvy Markers I got when I was eleven. Source: Internet