Top Definition
when your thong can be seen above your pants
wow she is whale tailin' tonight
by miranda k October 21, 2006
1 more definition
|Verb| - When a girls thong is showing or is high on her back.
Dang Monica, I see you Whale Tailin' tonight!

Girl I know you love the ocean, 'cause you Whale Tailin like crazy.
by PolaroidBlues June 01, 2014

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