Doodle

What a skilled visual artist will call one of their drawings. The drawing is only a "doodle" in the sense that their usual drawings are actually a good deal better (at least in terms of technical skill shown); thus, making this a form of bragging.

The artist may also refer to the drawing as a scribble instead of a doodle.

You can see this use of the word "doodle" or "scribble" in online forums or art communities where visual artists post their artwork and provide comments about them. For example, deviantart and tumblr.

Artist: "Just a doodle I did the other day" *posts fairly detailed and good-quality artwork*

Fans: *give praise*