What does the term wet feet in golfing mean?

Answer 1

I have no idea how the term originated (but would be interested to hear theories), but if you have "wet feet", it means you have teed up in front of the tee markers.

If you actually play your tee shot from there, you will incur a 2 stroke penalty in stroke play and you must replay your shot. In match play, there is no penalty, but your opponent may ask you to replay the shot.