Top definition
Standing around pretending/imagining that you are doing something, when you are actually not.
(At a car wash)

Guy1: Why is he taking so long to wash my car?
Guy2: He's just standing there with the windex in his hand.

Guy1: Let me ask him.

Guy1: What are you doing?
Duckbiller: I'm doing your windows!
Guy 2: Why, he's just duckbilling!
by Pussybasher69 May 25, 2013
Get a Duckbilling mug for your fish Riley.
2
When you are licking ya gal out and ya nose is so large that it penetrates her asshole whilst ya are doing ya business
Oh mate last night I was duckbilling the Mrs well good
by _fuknwotmeht November 26, 2017
Get the Duckbilling neck gaiter and mug.