しっぽ尻尾shippoしりお尻尾shirio
1.
The elongated appendage at the rear of an animal, often used for balance, communication, or social signaling.
2.
The tapered end of an elongated object or item, such as the thin end of a radish pickle.
3.
The last position in a line or queue, indicating a trailing spot in any sort of arrangement or order.
4.
A sign or clue that reveals hidden truths or deceptions, often used to describe the act of being caught in a lie or deceit.
Example:
その犬はしっぽを振っていた。