bite the hand that feeds you
Show ingratitude, turn against a benefactor. For example, The college gave me a scholarship, so I shouldn't bite the hand that feeds me and criticize its hiring policies. Used about 600 b.c. by the Greek poet Sappho, this metaphor of a dog biting its master was first recorded in English in 1711.
Words nearby bite the hand that feeds you
bite one's nails,
bite one's tongue,
bite someone's head off,
bite the bullet,
bite the dust,
bite the hand that feeds you,
bite-size,
bitemporal hemianopsia,
biteplate,
biter,
bitewing