From Great Britain comes this nice one:

Don’t be such a ham-skulled dunder buttocks

That Mitchell and Webb Look

Let’s be precise about a winning smile, shall we?

An optimal smile is characterized by an upper lip that reaches the gingival margins, with an upward or straight curvature between the philtrum and commissures; an upper incisal line coincident with the border of the lower lip; minimal or no lateral negative space; a commissural line and occlusal frontal plane parallel to the pupillary line; and harmoniously integrated dental and gingival components.

unknown, found on a web page