When you reveal something unexpected in a flashy way.
Person 1: “Why is the orange juice missing?”
Person 2: “HAHAHA FOOL. YOU HAVE ACTIVATED MY TRAP CARD. I FUCKING DRANK IT ALL.”
Person 1: “Why?”
Person 2: “HAHAHA YOU ACTIVATED MY TRAP CARD AGAIN. I WAS FUCKING THIRSTY.”
by Lug1a October 10, 2019
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term used to describe a very attractive, under-aged person with which one would have sex.
Roommate 1: "Would you tap this chick?"

Roommate 2: "Yeah bro, duh."

Roommate 1: "Hold on, let me reach in my pocket and pull out a TRAP CARD!"
by bamboozleU October 26, 2010
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the deadly trap card! people use this as a lure and trick there friends/foes to clicking it. charbz k0 is indeed the #1 trap carder. chris kb's him for this.
charbz k0: sup ut look at dis *link*
UT: OMG trap card sad kb time
by jameiei February 20, 2009
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The 1 and only Deathify can achieve this, as his prowess over mortal beings is about god-like status. K.
Deathify: OMFG look at this pro pk WOOT. Guy: *clicks link* WDF??? Deathify: GF.(trap-card)
by burkina faso February 27, 2009
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A phrase yelled when someone triggers your trap card, usually followed by "Oh no!"
"Oops, I stood on this doormat."
"You triggered my trap card!!!"
"Oh no!"
by Phaz November 3, 2007
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A stupid rhetorical phrase used in the 4Kids version of the anime YuGiOh, that makes most anime fans embarrassed to watch it.

"You activated my trap card! A costly mistake!"

Seriously...wtf!? Well, that's what you get for watching an anime about a fraking card game.
Main character plays a card in a ridiculously nonsensical children's card game in which there seems to be no identifiable rules.

Main character: "You've activated my trap card! A costly mistake!"

Minor character is physically injured from the results of said children's card game.
by Eliyon July 11, 2009
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A catch phrase that came from the Yu-Gi-Oh Trading Card game, and is usually said when someone is about to get owned, with complete confidence.
*man 1 gets enraged with fury*
Man 2: Ha, you couldn't beat me even if you tried!
Man 1: You just activated my trap card.
by seanbond5 March 2, 2012
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