run away with the notion

run away with the notion

To take a fantastical or unrealistic idea as something that is definitely true or destined to happen. His book appeared on a local bestseller list, and now he's run away with the notion of being a famous author. Local tabloids are running away with the notion of the mayor being a part of a big conspiracy.
See also: away, notion, run

run aˈway with the idea/notion

(spoken) believe something that is not true: Don’t run away with the idea that you’re going to be famous just because you’ve appeared on television once.
See also: away, idea, notion, run
References in periodicals archive ?
Please do not run away with the notion that I am no fan of coffee.
O'Neill urged fans not to run away with the notion that Villa are on course for Europe even though they will be joint fifth with Chelsea if they win tonight.
Don't run away with the notion that local politics is a laugh because an MP and a council are engaged in a slanging match.
No one in their right mind would dare underestimate them, but don't run away with the notion that France are sort of unbeatable unofficial world champions.
Do not run away with the notion that I have any time for the bootleggers, who are no doubt greedy, shadowy and thoroughly beastly.
Martin Laursen was delighted to help set Aston Villa on their way to victory over Derby County but immediately urged his team-mates and the supporters not to run away with the notion of European football - just yet.
THE earth may well be a bitch and we might be born astride of a grave, but don't run away with the notion that Godot is a play of unremitting gloom.