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2.
when someone slides their hand through someone else's butt crack and yells Discover!

(see visa)
"I just discovered kaley's butt crack."
by gruff mcgruff November 09, 2008
 
1.
A credit card which most stores do NOT accept. Discover usually has a high credit limit.
I went to the audio/video store to buy a plasma tv, and the store wouldn't take my Discover card.
by qbert January 25, 2004