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