I don't give monkey´s
Your guess is as good as mine
Bite the bullet.
Let’s have a butcher’s.
Not my cup of tea
To do something unpleasant or painful because it is necessary even though you would like to avoid it.
Something that someone likes or is good at usually used in negative statements
To not care at all about something
When you don't know the answer to a question.
Have a look at something