Gotcha
Gotcha! is an Ability Word which, as of November 2004, has only been seen in Unhinged. It groups together abilities on cards which allow recursion from the graveyard when its owner says "Gotcha!" in response to a specific event, normally something an opponent is doing.
Example
Stop That (B)
Instant
Target Player discards a card.
Gotcha! - Whenever an opponent audibly flicks the cards in his or her hand, you may say "Gotcha!" If you do, return Stop That from your graveyard to your hand.