Definition

An old-fashioned, somewhat garbled way of saying 'you're welcome' that sounds like it came straight out of a 1950s sitcom. If you hear this, you're either talking to someone's grandpa or someone who's deliberately being quirky.

Example Usage

I held the elevator door for an elderly man and he said 'Mur!' in the most sincere way possible.

Source: Urban Dictionary (https://www.urbandictionary.com/define.php?term=Mur&defid=4312525)