"break up with someone" = end a relationship with someone
"Jacob feels terrible because his girlfriend broke up with him last night."

"tie the knot" = get married
"When are you going to tie the knot? You and Sarah have been engaged for two years."

"give (someone) a hand" = help someone
"Could you give me a hand to move this sofa? It's heavy."

"bring home the bacon" = earn money for the family
"Who brings home the bacon in your family: your mom or dad?"

"sick as a dog" = very sick
"She has been sick as a dog for a week, and she really needs to see a doctor."

"run down" = very tired and exhausted
"Jeff is feeling run down, so he decided not to come to the party."

"movie buff" = someone who knows a lot about movies
"If you want to know anything about the movie industry, ask Phil. He's a real movie buff."

"sleep on it" = wait until tomorrow to make a decision
"She wanted to sleep on it before making such an important decision."

"right off the bat" = immediately
"When I called her yesterday, she told me right off the bat that she was getting married."