Worst Hand
The worst hand is a losing hand. In general, it means the weakest hand in a showdown, or the weakest hand that you can put another player on.
The simple explanation
After a showdown, the player with the worst hand loses. The word can be used for any hand that is beaten: 'he had the worst hand and still called'.
A closer look
Thinking about the worst hand that your opponent can have is a useful habit when you decide about bets: if the worst hand that can call you is still better than yours, you should not bet. In low games, the worst hand has another meaning, which depends on the rules. The words 'worst likely hand' describe a related idea.
A practical example
At showdown, a player with a pair of fives loses to a pair of nines. He had the worst hand.
Full explanation
The worst hand is a losing hand. In general, it means the weakest hand in a showdown, or the weakest hand that you can put another player on.
The worst hand is the one that loses.
It can also mean the weakest hand you expect from an opponent.
Think about the worst hand that can call your bet.
See also worst likely hand.