به نام خدا

Against the grain : بر خلاف عقاید عمل کردن

If doing something goes against the grain, you're unwilling to do it because it contradicts what you believe in, but you have no real choice.

Age before beauty :اول بزرگتر ها

When this idiom is used, it is a way of allowing an older person to do something first, though often in a slightly sarcastic way.

Agony aunt: مشاور روزنامه ای

An agony aunt is a newspaper columnist who gives advice to people having problems, especially personal ones.

Ahead of the pack: از رقبا جلو افتادن 

If you are ahead of the pack, you have made more progress than your rivals.

Ahead of time :قبل از انتظار روی دادن

If something happens ahead of time, it happens early or before the set time.

Air your dirty laundry in public : سر درونی خود را فاش کردن

If you air your dirty laundry in public, you reveal aspects of your private life that should really remain private, by telling a secret, arguing in public, etc.

Albatross around your neck : مشکل از خودته

An albatross around, or round, your neck is a problem resulting from something you did that stops you from being successful.

Alike as two peas : مانند سیبی که از وسط نصف شده است

If people or things are as alike as two peas, they are identical.

Alive and kicking

If something is active and doing well, it is alive and kicking.  (It can be used for people too.)

All along : از اول به قضیه پی بردن

If you have known or suspected something all along, then you have felt this from the beginning.

All and sundry : همه و همه

This idiom is a way of emphasizing 'all', like saying 'each and every one'.

All bark and no bite: فقط هارت و پورت دارد

When someone talks tough but really isn't, they are all bark and no bite.

All bets are off : تمام توافقها از بین رفته اند

(USA) If all bets are off, then agreements that have been made no longer apply.

All dressed up and nowhere to go: بی خودی آماده بودن

You're prepared for something that isn't going to happen.

All ears : سراپا گوش

If someone says they're all ears, they are very interested in hearing about something.

All eyes on me: چشمها همه به چیزی متوجه بودن

If all eyes are on someone, then everyone is paying attention to them.