Final answer:
The connotation of the word 'lot' suggests that the mother believes her son is corrupt and worthless.
Step-by-step explanation:
The connotation of the word 'lot' in the mother's statement suggests that she believes her son is corrupt and worthless.
The word 'lot' implies that the mother sees her son as being of a low and undesirable quality. It indicates that she holds a negative opinion of him and considers him to be morally flawed. This connotation is reinforced by the mother's statement that he is a 'bad lot,' further emphasizing her belief that he is a corrupt and worthless individual.