Top Definition
A controversial sex move in which a person inserts ping pong balls into their anus (gastro), and then shoots out said balls into the mouth of a willing participant (pong).
"I heard Mike enjoys a good same of gastro pong. I wouldn't share any drinks with him if I were you."
by Euro89 February 06, 2014

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The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

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The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

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The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

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