VXL
,a monogram on lockets, etc., stands for U XL (you excel).
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A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Entry taken from Dictionary of Phrase and Fable, edited by the Rev. E. Cobham Brewer, LL.D. and revised in 1895.
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VXL
Wabun