The phrase “one is going to murder someone” can, of course, be used literally but it is often used in an exaggerated figurative way.
Meaning of Idiom “Going to (Will) Murder Someone”
When we say someone is going to murder someone we mean that they are going to be extremely angry, wrathful, enraged, etc. However, there is not actual intent to kill someone implied.
If I get interrupted one more time I’m going murder someone,” is an example of how this idiom is used. Here, the speaker means that they are going to be very angry and perhaps fly off the handle, raise hell, or jump down someone’s throat. The idiom is often used when punishment is anticipated, especially in regards to angry parents.
The word “kill” is often substituted in the United States.
Sentence Examples
“If you read my diary again I swear I’m going to murder you!”
“If you mess with Jon’s guitar he’s going to murder you.”
“You can’t let my parents know I got in a fight. They’ll murder me!”
“One more smirk about my little medical problem and I’m going to kill someone.”
“I got a dent in the car. My father is going to kill me.”
Origin
This idiom is one of several ways the word murder or kill is used in an exaggerated way to add emphasis.