Skunk

A skunk in cribbage is when one player wins with a margin of 31 points or more. Another way to say it is that if he makes 121 or more when his opponent has 90 or less, he skunks the oppoent, which counts as two games.

A double skunk is when you win by 61 points, and is worth 3 games, though this rule is optional.

Is it a skunk after the hand

Is it a skunk after the hand is completed or can it happen halfway through a hand?

skunk

1st player out wins at the time of peg out no matter of what stage of the hand. If the other player(s) are 31 or more points behind it's a skunk