Much like faeces slowly exiting the anus in the style of the 'Turtle's head,' popping in and out before you are able to pass matter, the Turtle Grape is when one pushes a grape from their pursed mouth in this motion.
This can be done to comically imitate the suppression of a popping out poo.
"Hey Tilly. check it out, I'm crapping this grape out of my mouth like a Turtle's Head"
-"Oh yeah, it's a Turtle Grape ahahahaah!"
by Chuzzy and Tills February 6, 2011
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