# tiger in one's tank

> English word · Noun

## Definitions
1. enthusiasm, energy, fervor

## Etymology
From a postwar advertising campaign for Esso petrol: "Put a tiger in your tank".

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/tiger-in-one-s-tank