A synonym for the double popped collar. This is when an individual wears two polo shirts, each with their collar folded up. These polo shirts are typically pastel coloured, although harsher colours are sometimes worn.
Wearing the biplane is a sufficient condition for being a douchebag.
a turtleneck decked out with images of birds, these rare spectacles can usually be found in your grandma's closet or at your local goodwill
Dan : "What the hell is that girl over there wearing? Is that a turtleneck with birds on it?"
Rick : "That's a birdleneck and shes hot af. I wonder whats underneath that sexy neckline."b