Definition: believing things that can’t possibly be true
In the popular FOX TV series Glee, cheerleader Brittany Pierce is one of the most popular members of the Glee Club. However, her NAIVE, childlike personality sometimes makes her DELUSIONAL as well. For example, she still believes in Santa Claus and unicorns, and thought that Irish exchange student Rory was a leprechaun. In fact her DELUSIONAL behavior with regards to her best friend Santana’s sexuality even caused her breakup with wheelchair-bound Artie.