The will to create something new, or the inspiration to create something new. Whether it is art, music, acting, or any form of creative expression in any creative field or the like. While it may seem like a sexual term because of the word libido, it's in fact a funny twist of two terms, and when combined simply expresses the urge to either create, or perhaps not to create something artistic. Much like a person's actual libido, a person's sex drive typically comes and goes in waves, similar to an individual's desire to create a new form of artistic expression.
My artsy libido was humming, I was truly inspired and felt the need to create something new and exciting.