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One of those locking "puzzle nuts" or "lock lugs" used to prevent theft of high-priced automotive rims. Typically, one standard lug nut per rim is replaced with a bling nut. Bling nuts can not be easily removed without access to the corresponding specially-keyed socket.

Expensive aftermarket rims are a typical bling accessory added to cars to customize the appearance.
I used bling nuts and everything but those pricks still managed to jack the rims off my car last night.
by Spewey April 13, 2004
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