camel hats or flap hats
Flap caps or Painters Caps with flaps
. . . flaps!
The flaps are simply called flaps.
They are quite literally called flaps, and they make the plane go up, down, left and right.
winglett
winglett
Flaps is the only name, although there are similar devices called slats and spoilers.
They are actually called 'caps'. The underside of the cap has 'gills'
The ear flaps are called 'leather'.
tricuspid valve
Labia, you were asking for it.
I have never heard baseball caps called that but there is a line of baseball caps marketed by New Era that are called '59FIFTY'.