"biting the hand that feeds you"

fadi99

Definition
Turning on your master/superior who has never mistreated you;
Turning on your benefactor
Hurting someone who was/has been helping you

Example
\"Rufus deserved what he got. He bit the hand that fed him, in a manner of
speaking.\"

\"Never bite that hand that feeds you. You may need it later.\"

Origin
Unclear, probably came from a dog owner. Supposed Greek poet Sopho first
used this expression back in 600 B.C., but first recorded English use is
1711. Unfortunately neither reference had any examples.

Chinese Equivalent
狗咬鲁洞宾，不识好歹 ?

谭秋

忘恩负义呢？