Last night was well avant!
(As A Prefix) That was an avant-match, 10 bookings!
Avant-garde represents a pushing of the boundaries of what is accepted as the norm or the status quo, primarily in the cultural realm. The notion of the existence of the avant-garde is considered by some to be a hallmark of modernism, as distinct from postmodernism. However, this is not true in the case of music as many pieces are still being released which are generally considered avant-garde in popular culture.2 Many artists have aligned themselves with the avant-garde and still continue to do so, tracing a history from Dada to the Situationists to postmodern artists such as the L=A=N=G=U=A=G=E writers in the 1980's to many art collectives in the "post-postmodernist"3 times of today.4
Alternatively, anything that regular/already established in their career people would disregard as shit. A term used to protect those "true artists whose genius is just misunderstood."
Normal person: "That was poetry? It was just your grocery list repeated in a different order on every page."
Dirty, hippie, English-major type: "Ugh! It's avant garde. You just can't understand true art."