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1.
One who puts on airs, one who attempts to give the illusion of class or intelligence or refinement while, in truth, possessing none of the above.
Humphrey: My stars! I do say this crumpet has a fine oaky taste with a hint of autumn!
Reginald: Humphrey, you witwig! That is a urinal cake! Do not attempt to impress me with your false culinary criticism!
Humphrey: But... How will I make you love me as I love you?
Reginald: Oh you witwig... You know that I already do.

*they embrace*