Crocodile Tear Meaning

Example : 1877, Charles Reade, The Woman Hater, ch. 2:  At last he contrived to squeeze out one of his little hysterical tears, and drop it on her hand. Now, the girl was not butter, like some of her sex; far from it: but neither was she wood—indeed, she was not old enough for that—so this crocodile tear won her for the time being.1864, Anthony Trollope, Can You Forgive Her?, chapter 19:  And in all her letters since, she had spoken of her aunt as a silly, vain, worldly woman, weeping crocodile tears, for an old husband whose death had released her from the tedium of his company.