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1 definition by antigoon

...means Amsterdam.

(Old city crest has red shield with black stripe and XXX.)

According to some it's the source of the porn usage, meaning "this is the dog's bollocks, it's from Amsterdam".
XXX is embossed on the suggestive meaty bollards which line every street. They're called Amsterdammetjes or little Amsterdammers.
by antigoon March 12, 2004