well thumbed
US /ˌwel ˈθʌmd/
UK /ˌwel ˈθʌmd/

1.
abgegriffen, vielgelesen
having been read or handled a lot and consequently soiled or damaged
:
•
His favorite book was old and well thumbed.
Sein Lieblingsbuch war alt und abgegriffen.
•
The dictionary on the shelf was clearly well thumbed.
Das Wörterbuch im Regal war eindeutig abgegriffen.