بوابة الثانوية العامة المصرية

Back foot
(UK) If you are on your back foot, you are at a disadvantage and forced to be defensive of your position.
Back number
Something that's a back number is dated or out of fashion.
Back the wrong horse
If you back the wrong horse, you give your support to the losing side in something.
Back to back
If things happen back to back, they are directly one after another.
Back to square one
If you are back to square one, you have to start from the beginning again.
Back to the drawing board
If you have to go back to the drawing board, you have to go back to the beginning and start something again.
Back to the salt mine
If someone says they have to go back to the salt mine, they have to return to work.
Back to the wall
If you have your back to the wall, you are in a difficult situation with very little room for manoeuvre.
Backseat driver
A backseat driver is an annoying person who is fond of giving advice to the person performing a task or doing something, especially when the advice is either wrong or unwelcome.
Bad Apple
A person who is bad and makes other bad is a bad apple.
Bad blood
If people feel hate because of things that happened in the past, there is bad blood between them.
Bad egg
A person who cannot be trusted is a bad egg. Good egg is the opposite.
Bad hair day
If you're having a bad hair day, things are not going the way you would like or had planned.
Bad mouth
(UK) When you are bad mouthing,you are saying negative things about someone or something.('Bad-mouth' and 'badmouth' are also used.)