bender card
An imaginary card that you never knew you had until you are informed that you have dropped it. An instinctive glance at the ground is then instant proof that you are a member of this exclusive club.
written by Ke*in*Do*ney, approved by Log
Similarly, any response to a cry of "Oi, you've dropped your lipstick" would be enough to prove your gayness. But not for girls, obviously.
written by Ni*k Hu*t, approved by Phil
The more intelligent kids would mime picking up the card, looking at it and then saying "There's been a terrible mistake, this card has your name on it. And a little photo of you bumming your dad."
written by Lu*e Ta*se*, approved by Susan