number two—
1. the person immediately subordinate to the head of an organization:
- When David could not attend a meeting, he sent his number two to deputize for him.
2. (euph.) is used of the act of defecation:
- The child is early taught to refer to his needs as “number one” and “number two.”
number twos—(coll.) one’s second best clothes or uniform:
- “Is this number ones and number twos, sir?” he said “or is there any flexibility on that?”