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A phrase used to describe the act of female masturbation, especially if she hasn't in a while. If you know a female who is acting cranky, bitchy, or suspicious, chances are, she could use a good turtle buttering.
"Becky, you look a bit under the weather, maybe you should go butter that turtle, it's the best thing for you."- Becky's Grandmother

Rhianna likes to butter the turtle whenever she's on stage.
by JHONNY!!! August 31, 2013
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