1. Motorboating but down under and bit to the rear.

2. The act of someone oscillating their face back and forth while pressed against your gooch, while making 'brrrrrrr' sounds.

3. Motorboating for your gooch.
Guy 1: Gee this Coronavirus is really allowing me to find out more about what I like in bed
Guy 2: Oh yeah me too, the wife gave me an Australian Motorboat last night it was nuts
by dinkysweets104 February 9, 2021
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When you're performing cunnilingus on a woman and you blow into pussy lips like a trumpet, causing the lips to flap
Your mother's pussy lips are stretched after all the Australian Motorboats she's gotten
by Ceweal Ceweal with Gwavy February 13, 2018
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