On the house: مجانی، به حساب رستوران یا فروشنده
We had to pay for the food, but the drinks were on the house.

Know the ropes: فوت و فن را بلد بودن ، کار کشته بودن
Let john do the job, he knows the ropes.

Walk on air: از خوشحالی پرواز کردن ...
Mick was walking on air on his graduation day.

Save someone's neck: به داد کسی رسیدن
Thanks for not letting the boss fire me. You save my neck in time.

Make a mountain out of a molehill: از کاه کوه ساختن
Don't let such a trivial things bother you so much. You're just making a mountain out of a molehill.

Twist one's arm: کسی را مجبور کردن
Daddy won't buy me the car unless I twist his arm.

Hang in there: طاقت اوردن، استقامت کردن
I know things are pretty tough now. If you hang in there, things will come out okay.

Lose one's shirt:دار و ندار رو از دست دادن، اس و پاس شدن
I almost lost my shirt on that damn business.

Go bananas: از شدت خوشحالی یا عصبانیت دیوانه شدن
The children will go bananas when you tell them that trip is cancelled.

Give sth someone's best shot: نهایت تلاش خود را کردن
- Do you think you can fix the washing machine?
- I'm not sure, but I'll give it my best shot.

Go great guns: حسابی رو به راه بودن
- How's business, Ted?
- It's going great guns!

wear the pants:رئیس خانواده بودن، حاکم خانه بودن
In our family, It's my mother who wears the pants.