Better Out Than In was the name of Banksy's month-long 2013 residency tour of New York, in which he created new works almost every day for a month.
In the titular Better Out Than In graffiti piece, shown here on this Banksy Better Out Than In baseball hoodie, a tall flowering plant has had a boy painted beside it, in such a way that the plant looks like multicoloured vomit being emitted from the boy's mouth. This was the promotional artwork for the tour.
The title Better Out Than In is a reference to a quote by impressionist Paul Cézanne, "All pictures painted inside, in the studio, will never be as good as those done outside." and was the inspiration for the tour.