A word closely linked with acting like a complete nerd. A 'Vandercruyssen' or a person doing Vandercruyssen-like things involves such activities such as recording classes, doing extra work when you don't need to and generally being a huge nerd.
"Get your Vandercruyssen out!"
"my Vandercruyssen is flying high"
"Rebecca did a vandercruyssen, she got 98% in english"