Deck Collection/Deck-out

A Deck-out, also known as a Library Out (A term used as in Magic: The Gathering, a deck is called a "library", is a slang term used to refer defeat caused by having no cards in one's deck. The act of causing deckout is called Mill, a slang term deprived from the Magic: The Gathering card Millstone.

Deatils
A Deck-out is usually caused by the player drawing the last card in their deck, although it can be artificially induced by moving cards in their deck to other zones such as the Graveyard.