Top definition
any credit card, academic honor society fraternity card, library card, video rental card, secret society membership card or the like.
This is an eexample of the word "powder card":

Antonio Juan Johnson took a small chipped off rock of Peru's famous and with the assistance of a mortar and petal he ground the pebble into a fairly course gritty substrate. He then proceeded the cut lines with his Phi Kappa Phi card.
by Yehuda1967 January 16, 2010
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