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1.
The much hated serious subject raised by someone following a funny conversation, usually about a similar or related subject.
John: And then I spent an hour in the waiting room with bandage around my head and a golf club in my hand!
Laughter
Sally: Man, that's funny John. But don't you think it's the current political corruption that's causing these increased hospital waiting times?
John: Did you really just pull the serious card?
by Sleepy Sasquatch September 07, 2011