pay (sb) a compliment
 تعریف کردن از کسی

to give someone a compliment; to offer someone an admiring comment

EXAMPLE 1:  Professor Russo paid Jennifer a compliment. He said she had a beautiful smile.

EXAMPLE 2: Isn't it wonderful to pay someone a compliment? It makes them feel good, and it doesn't cost you anything!
 

on thin ice (with sb)
 احتمال بوجود آمدن دعوا بین کسی

to be in a dangerous position; to be temporarily on somebody's bad side

EXAMPLE 1: Joey was on thin ice with his mom after he spent his lunch money on candy bars. the movie theater with another girl.

EXAMPLE 2: Bill was on thin ice with his girlfriend after she saw him at

have one's heart set on
عزم خود را جزم کردن

to really want something

EXAMPLE 1: Nicole has her heart set on going to New York this weekend.

EXAMPLE 2: Did you really have your heart set on going to Harvard

lost cause
بی فایده بودن انجام کاری

something hopeless

EXAMPLE 1: Cindy spent five years studying Russian. Finally, she realized it was a lost cause. She would never learn it.

EXAMPLE 2: Jack needs to stop drinking so much coffee, but he's so addicted to caffeine that it's a lost cause

butt in
روند ادامه کاری را قطع کردن ، دخالت کردن

to interrupt; to interfere

EXAMPLE l: Nancy is always butting in to other people's business.

EXAMPLE 2: Sara is really rude. She always butts in to other people's conversations

head and shoulders above
یک سرو گردن بالاتر بودن

far superior to

EXAMPLE l: The Boston Symphony Orchestra is head and shoulders above any other orchestra in the area.

EXAMPLE 2: I can't believe you only won second prize in the competition. You were head and shoulders above the first-prize winner

hit the nail on the head

زدی تو خال

to be right

EXAMPLE 1: Dawn hit the nail on the head when she said that Tiffany is jealous of Amber.

EXAMPLE 2: Steve hit the nail on the head with his idea of moving his company's manufacturing facility to China

stab sb in the back

زیرآب کسی را زدن

to betray someone

EXAMPLE 1: Jill and Heather were friends, until Heather stabbed Jill in the back by stealing her boyfriend.

EXAMPLE 2: You're firing me after all I've done for this company? You're really stabbing me in the back

look on the bright side
نیمه پر لیوان را دیدن

to be optimistic; to think about the positive part or aspect of a situation

EXAMPLE 1: Leo was upset that his soccer game was canceled. His mother said, "Look on the bright side, now you can stay home and watch TV."

EXAMPLE 2: You lost your job? Look on the bright side, now you'll have more free time

live from hand to mouth
بخور و نمیر زندگی کردن

to barely have enough money to survive

EXAMPLE 1: Jenny was earning $5 an hour working at the store. She was really living from hand to mouth.

EXAMPLE 2: George is really poor. He lives from hand to mouth

ast resort
تیرآخر

if there are no other alternatives left; the last solution for getting out of a difficulty

EXAMPLE 1: David was locked out of his house. He knew that as a last resort, he could always break a window.

EXAMPLE 2: I don't like taking medicine. I'll only take it as a last resort

keep one's chin up
همچنان امیدوار و مثبت فکر کردن

طرف از یه چی ناراحته میخوای بگی " بابا بی خیال......"

to stay positive

EXAMPLE 1: Even when he was unemployed and homeless, Bill managed to keep his chin up.

EXAMPLE 2: Keep your chin up! You'll find your lost dog soon

easier said than done
حرف زدنش آشانتر از عملکردنش است

more difficult than you think:

EXAMPLE 1: You want to climb Mount Everest? Easier said than done!

EXAMPLE 2: Moving into a new home is easier said than done