>>caeruleancentaur wrote:

>>flex, v. exhibit the strength of; "The victorious army flexes 
>>its invincibility"  
>> Neither the AHD nor Wiktionary give this as a definition 
>>of "flex."

>R A Brown <ray@...> wrote:

>Neither does Chamber's English Dictionary nor AFAIK does the Oxford 
>English Dictionary.

>I would, without the gloss above, understand to mean that the 
>victorious army "bent its invincibility'. i.e. was flexible and 
>showed magnanimity and tolerance, although it was invincible.

"To flex a muscle" brings to my mind a picture of a man (or a woman) 
displaying his biceps.  The connotation would be that of showing off 
or displaying rather than bending.

Perhaps that is the connotation intended in the above example.