A very severe headache, as if an imaginary axe is "splitting your head in two".
The idiom "you have a splitting headache" originates from the metaphorical use of "splitting" to describe the intense pain and pressure experienced during a severe headache. This phrase likely reflects the sensation of the head feeling as if it might literally split due to the intensity of the pain. The expression has been in use since at least the 19th century, capturing the experience of headache sufferers in a vivid and relatable manner.
Splitting Headache was created on 2005-07-12.
Splitting. I have a splitting headache.
My brother can be annoying at times. My brother gets on my nerves sometimes.
I took the afternoon off work because I had a splitting headache.
The Good Guys - 1968 The Splitting Headache 1-22 was released on: USA: 5 March 1969
splitting severe
It's not really an idiom. It means "what are you thinking about."
RFP is not an idiom. It's an abbreviation.
It is not an idiom, it means your nose is itching.
It's not an idiom. It means the tip of your nostril.
idiom means expression like a page in a book