powder card 

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.

powder card by Yehuda1967 January 17, 2010

power cards 

Noun. Slang term from the game Egyptian Rat Screw, referring to face cards, which allow you to win portions of the hand and are necessary to the strategy of winning. Someone with power cards is in control or lucky. Conversely, someone without power cards is on their way to losing.

Person 1: Hey, congratulations on your team's win!
Person 2: Yeah I know, we definitely had all the power cards last night.

Person 1: Oh wow, you look like a mess, what happened?
Person 2: I broke up with Becky last night. God, I've just got no more power cards.

power cards by Sigma0 December 2, 2005