Definition from Wiktionary, the free dictionary
- Used other than as an idiom: The tail of a whale.
- (slang) An unintentional display of a thong above the waistband of trousers etc.
- An automotive spoiler
- "the duck-tail spoiler was replaced with a whale tail for the US version of the Carrera." Porsche 911 Performance Handbook - Page 16. Bruce Anderson - 1997.