One of the mysteries of the English language finally explained.
A persistent or indefatigable person or phenomenon.
1990s; earliest use found in The Denver Post. From Energizer Bunny, the name of a battery-operated toy rabbit represented as never running out of energy, featured from 1989 in a television advertising campaign for batteries.
Energizer bunny/ˌɛnədʒʌɪzə ˈbʌni/
In this article we explore how to impress employers with a spot-on CV.