similar to in artfag, an artfucker is one who is very involved in art and the local art scene. unlike the word artfag, however, artfucker specifically refers to someone who is arrogant and self-indulgent in making and talking about their art and art in general.
"God, did you hear that artfucker today? She wouldn't stop talking about her own technique!"
"I know, she was terrible! And the way she wouldn't even consider another person's piece."