A random wave at the beach, most commonly on the U.S. Northern Pacific Coast, that comes to shore much farther and higher than any of the other recent waves. They aren't noticeable beforehand from shore and "sneak" up on people unexpectedly, many times causing people to be pushed over, or even swept out to sea.

when you've done something so cringe you can't stop replaying it in your head and it stops you from getting on with your every day life