on the tip of your tongue
idiomPart oftip
on the tip of your tongue — idiom
1. You feel sure you know a word or name but cannot recall it at the moment.
1.idiom
Definition
You feel sure you know a word or name but cannot recall it at the moment.
Example
Mina had the actor's name on the tip of her tongue.
Is the answer on the tip of your tongue right now?