What is the old card game beginning with SK?

The old card game beginning with SK is likely Skunk.

Skunk is a dice game, not a card game, but it is a very old game, and the name is similar to what you're looking for.

Do you have any other clues about the card game? Perhaps the number of players, the type of deck used, or a description of the gameplay? This information would be helpful in identifying the specific game you are thinking of.