Top Definition
The plastic tampon applicator that is found on a beach after a high tide or a storm surge.
Normally found by children who play in the sand. To save embarrassment or an in-depth conversation with a 3 year old you simply dismiss the buried treasure by non-chalantly saying "Oh honey, you just found a sea whistle!" Then you blow into the top of it to make a sound. You and your children will laugh for hours!!

For added fun you can send the kids on a sea whistle treasure hunt!! gather enough sea whistles
and you can sting them together and make a necklace!
by Lil' Mermaid October 12, 2006

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