as dry as a bone
- very dry
The river bed was as dry as a bone at the end of the summer.
as soft as a baby's bottom
- very soft and smooth
My new silk pajamas are as soft as a baby's bottom.
at each other's throats
- fighting or arguing all the time
The two boys were at each other's throats when they entered the room.
at the top of one`s lungs
- with a very loud voice
I yelled at the top of my lungs to get the man's attention.
(one's) back is against the wall
- one is in a very difficult position
The man's back was against the wall and there was nothing that he could do to change the situation.
back-to-back
- next to each other and touching backs
The students were sitting back-to-back as they exercised in the gym class.
bad blood (between people)
- anger or a bad relationship due to past problems with someone
There is much bad blood between the two supervisors.
bare bones (of something)
- the most basic and important parts of something
The company had to restructure and most services were cut to the bare bones of the operation.
behind (someone`s) back
- without someone's knowledge, secretly, when someone is absent
I do not like people who talk behind my back.
belly up
- bankrupt
The small video store near my house is now belly-up.
blood is thicker than water
- family members are closer to one another than to others
Blood is thicker than water and people usually support and help their family in times of trouble.
blood on the carpet
- much trouble
There was much blood on the carpet after the meeting.
blood runs cold
- terrified or horrified
My blood ran cold when I saw the poison spider on my bed.