The act of burrowing your nose into someones anus durring sexual playtime. A gluteal motor boat. Also known as a "Steam Boat Willy".
We started with the Dutch rudder, then moved on to the Dirty Sanchez, and ended with a lengthy and lively Grundle.
To burrow your nose into an anus durring sexaul playtime. Also known as a Grundle.
The key to any good Grundle or steamboat willy is copious amounts of ass sweat.
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