The definition of artsy is someone who is very involved in, and enthusiastic about, artistic endeavors, though it may also describe someone who is pretentious about their enthusiasm for the arts.
An example of someone who is artsy is someone who shows constant interest in his sculpting and painting.
Informal having or showing artistic pretensions: often seen as more pejorative than arty
Origin of artsysee -sy
adjectiveart·si·er, art·si·est Informal
(comparative artsier, superlative artsiest)