work like a dog

مثل خر کار کردن

to work very hard

EXAMPLE 1: Larry became an investment banker after college, and now he works like a dog.
 

not sleep a wink
چشم بهم نزدن(نخوابیدن)

to be awake all night

EXAMPLE 1: Ted was so nervous about his chemistry test that he didn't sleep a wink the night before.

EXAMPLE 2: It's not surprising that Jill didn't sleep a wink last night. She drank a large cup of coffee before going to bed.
 

not have a clue
معلوماتی در مورد چیزی داشتن

to know nothing about

EXAMPLE 1: Bob talks about working at McDonald's, but the truth is he doesn't have a clue about making hamburgers.

EXAMPLE 2: "Do you know how to fix a broken printer?" - "No, I don't have a clue!"
 

needless to say

لازم به گفتن نیست و واضح است

obviously

EXAMPLE 1: You've got a test tomorrow morning. Needless to say, you can't stay out late tonight.

EXAMPLE 2: Needless to say, you shouldn't have waited until Christmas Eve to do your shopping. The stores are going to be very crowded!
 

mixed feelings
احساس دوگانگی و دودلی داشتن

to feel positive about one aspect of something and negative about another

EXAMPLE 1: When our houseguests decided to stay for another week, I had mixed feelings. On the one hand, I enjoyed hanging out with them.

EXAMPLE 2: I have mixed feelings about the president of our company. He's good with the clients, but he's nasty to his employees.
 

happy camper  
 طرف تو یه جاییش عروسیه ، خوشحال

a happy person; a satisfied participant

EXAMPLE 1: When Linda's passport was stolen in Florence, she was not a happy camper.

EXAMPLE 2: Jack's a happy camper today. He's smiling and whistling.
!
 

give it a shot
 یک سعیی بکن

to try something

EXAMPLE 1: I've never tried to make wine in my bathtub before, but perhaps I'll give it a shot.

EXAMPLE 2: You can't open that jar? Let me give it a shot.

Fat chance!
شانس خیلی کم

definitely not

EXAMPLE 1: The boys at school are always laughing at Dana. Will she be invited to the school dance? Fat chance!

EXAMPLE 2: You want to borrow my new car and drive it across the country? Fat chance!

crash course on 
دوره فشرده هر درس

short and intensive instruction

EXAMPLE 1: Yesterday, Joan's son sat down with her for a couple of hours and gave her a crash course on using the Internet.

EXAMPLE 2: Rachel had a date on Friday night with an auto mechanic. He gave her a crash course on changing her oil.

bright and early
صبح خروس خون 

early in the morning

EXAMPLE 1: Our flight to Berlin leaves at :00 a.m. tomorrow, so we'll have to get up bright and early.

EXAMPLE 2: We have lots of cookies to bake so we'll have to start bright and early tomorrow.