1.  mocker(n = noun.person) flouter, jeerer, scoffer - someone who jeers or mocks or treats something with contempt or calls out in derision;
is a kind of disagreeable person, unpleasant person
Derived forms verb mock₁, verb mock₂

2.  mocker(n = noun.animal) mimus polyglotktos, mockingbird - long-tailed grey-and-white songbird of the southern United States able to mimic songs of other birds;
is a kind of oscine, oscine bird
is a member of genus mimus, mimus

1.  One who, or that which, mocks; a scorner; a scoffer; a derider. [1913 Webster]

2.  A deceiver; an impostor. [1913 Webster]

3.  A mocking bird. [1913 Webster]

mocker, n. a person who mocks.

Idiom:
put the mockers on sl.
1 bring bad luck to.
2 put a stop to.

mocker nut