The Full Bug

According to David Lee Roth, the title for this song, from the Diver Down album, is a slang term. It refers to success. To succeed at something, you've got to give it everything you have, make the maximum effort, do everything possible, the full bug.

The guitar intro was performed by David Lee Roth, marking the last time he would record a guitar track on a Van Halen album. The harmonica solo was also performed by Roth.