OFF THE TOP OF ONE'S HEAD

Good morning,

Today's expression is: off the top of one's head

It means: To say something immediately and without thinking very much.

Example 1:
Mr. Carlyle: Sales have gone down this month. I'd like to hear your reasons why.
Mr. Adams: Off the top of my head, I'd have to say that the main reason is probably that we are in the post-Christmas period and people don't have that much money to spend.

Example 2:
Now, Mr. Adams, don't just answer off the top of your head. Take some time to analyse the information and please support your answer with facts.

Example 3:
Off the top of my head, I'd calculate that about 70% of the people who attended the meeting were women.

Enjoy your day!