Second Lady or Second Gentleman of the United States
The second lady of the United States or second gentleman (SLOTUS or SGOTUS) is the informal title held by the spouse of the vice president of the United States, concurrent with the vice president's term of office. The current second lady is Usha Vance, wife of JD Vance.
Source: Wikipedia — Second Lady or Second Gentleman of the United States (CC BY-SA 4.0)