When the top of one's thong can be seen over the rear waistline of the pants, forming what looks like a whale's tail.

For a literal whale's tail, see cetacean tail. See panty straps for when the straps are visible from the front.

Examples

• Danbooru post #4417687

See also

• bikini jeans
• downpants
• panty peek
• panty straps

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