to  bite  the hand that  feed   somebody
bite
baɪt
bait
the
ðə
dhē
hand
hænd
hānd
that
ðæt
dhāt
feed
fi:d
fid
somebody
sʌmbədi
sambēdi

英語での「 bite the hand that feed somebody 」の定義と意味

to bite the hand that feed somebody
01

to be ungrateful to the person who has helped one by mistreating or betraying them 

to [bite] the hand that [feed] {sb} definition and meaning
慣用句
After everything she did for him, he bit the hand that fed him. 
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