The card that
blackjack dealers (among other casino games) discard during active play. Showing
the card after a hand is considered
poor etiquette as the card could have changed the outcome of the hand in the player's favor. The same principle applies to a girl
telling a guy, who likes her, (or vice versa) that
he would've had a chance with her, had certain
circumstances were in affect. Making a heartbreaking outcome even more devastating.
Jack: "Hi, Jill. Would you like to go out this weekend?"
Jill: "Sorry, I have a boyfriend."
Jack: "Oh, I didn't know. No problem."
Jill "Yea we're talking about getting married. But you're totally
awesome. If I didn't have a b/f, I woulda SOOOO gone out with you."
Jack: "Sweetie, never
show the burn card."