Top Definition
The state in a card game such as Magic: The Gathering where a player has no cards in hand, and must rely purely on the card they draw each turn.
Why are you looking at me for responses? Can't you see I'm clearly in topdeck mode?
by Tier 4 October 21, 2010

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.