Sorry is a uncommon Enchantment card from Unglued (UGL), collector number 27. Current market price: $0.36, TCGplayer market prices via Scryfall.
Before any player casts a spell with the same name as a card in any graveyard, that player may say "sorry." If they don't, any other player may say "sorry" as the spell is being cast. When another player says "sorry" this way, counter the spell. Whenever a player says "sorry" at any other time, Sorry deals 2 damage to that player.