The term 'Vibrate Abnormally' can be summarized by the crossword solution 'SHIMMY, ' which is a 6-letter word. SHIMMY is a type of dance that involves shaking and swaying the body, usually from the waist down. It originated in the early 20th century as a form of African American social dance, and has since become popular in many other cultures. It is often performed to upbeat music, and is characterized by its fast, jerky movements.