jemandem ein Ohr abkauen
to talk someone's ear off; to pester someone with endless talking
Origin
The origin is not firmly documented; the phrase belongs to a family of colloquial images for excessive talking (cf. 'to talk a hole in someone's belly'). Early related forms appear around 1700; excessive talking is drastically pictured as 'chewing off' a body part.
Building blocks
Words in this expression
Examples
Am kaut meine ein ab.
On the phone my aunt always talks my ear off for hours.