Neither Three Nor Four Edit Meaning

1.

people of dubious character;

1. I felt uneasy at the party; it was full of people who were neither three nor four.

2. Mum doesn't want me to mix with those people; she thinks they are neither three nor four.

2.

(work) not done properly; (person) not qualified to do certain things; not decent company

He is not a proper plumber; your toilet will be neither three nor four if you let him do the plumbing for you.