Idiom/Expression #0007
mulsadmin2021-03-02T09:42:54+01:00'The clock is ticking' is used to say that there is not much time left to do something.
idiom/expression #0006
mulsadmin2021-03-02T09:45:38+01:00Not the sharpest tool in the box/shed(also not the brightest crayon in the box), not the brightest bulb on the Christmas tree. These are all informal expressions used to say that someone is not very intelligent or is not able to learn things quickly or easily, used humorously.
Idiom/expression #0005
mulsadmin2021-03-02T09:47:00+01:00'To cut a long story short’ is used to say that you are only going to mention the main facts of something.
Idiom #0004
mulsadmin2021-03-02T09:49:02+01:00To know something like the back of your hand is an informal way of saying that you have very good and detailed knowledge of something.