In a difficult position with no easy way out. For Example: The full saying is “up the creek without a paddle” which means you’re in a bad situation and don’t really have anything that can help you.

Allowing something to happen without outside influence. For Example: The full saying is usually “let nature take its course” which means “just relax and let’s just see how everything works out in the end.”

Someone who watches a lot of television and is therefore assumed to be lazy. For Example: “Did you invite Greg to the party?” “Yes, I did, but I doubt he’ll come. That guy is such a couch potato.”

In a difficult situation. For Example: “When Mary told me I had to choose between her or my career, I really found myself in a tight corner.”

To become tempermental or nervous. For Example: “When the store clerk told Bill they were out of beer, he lost his cool and shouted that he would never return to the store again.”