Dictionary

attack dog

noun

: a dog that has been trained to attack people

: a person who is known for making very harsh and personal criticisms of other people

Full Definition of ATTACK DOG

1
:  a dog trained to attack on command or on sight
2
:  a person noted for harsh, personal, and usually public verbal attacks against others <a political attack dog>
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First Known Use of ATTACK DOG

1970

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