Weezerpedia:Today's featured article/October 19, 2008

Sass is synonymous with Brian Bell, who is easily the sassiest guitarist to ever live. Sassier than Gwen Stefani and Prince combined. There has been much argument as to where Brian originally got his sass, but most Weezer fans believe that is something he was born with, not something one could learn.

Timeline of Sass

1994 - Brian shaves off his eyebrows to attempt "Ziggy Stardust" sass levels. He succeeds. Brief clips of this sass can be seen in the "Say It Ain't So" video.
2001 - The Impossible Bend shocks people around the world. Many untrained children fail at attempting the dangerously sassy move and are hospitalized.
2002 - In the "Keep Fishin'" music video, Brian demonstrates excellent "Ants in his pants" sass
2005 - In promo shots for Make Believe, Brian sports quite possibly his sassiest jacket. It is called "Yellow sass".
2006 - Brian Bell demonstrates "bad boy" sass in the "Perfect Situation" music video.
2007 - Long hair, bearded sass
2008 - Brian sports glasses with his long hair. When he sways, it is referred to as "glasses and sasses".