It's on the tip of my tongue.
Zum Beispiel:
Das Wort liegt mir auf der Zunge, aber ich kann mich im Moment nicht daran erinnern.
For example:
The word is on the tip of my tongue, but I can't remember it at the moment.
To know more about how German idioms are used in everyday language and how you can learn them to improve your language skills, take this German Idioms Class.
To get an insight into the origin of the German idioms and understand why they are important to speak German well, read this German Idioms Guide.
To learn more about this topic, use the reviews of German idioms books prepared by the LearnPlus German language tutors.
