A: Alben Barkley (1949-1953, under Harry S. Truman).
Barkley’s young grandson, Stephen M. Truitt suggested “Veep” as an easier address rather than the overly stuffy “Mr. Vice President.” Barkley recalled this story at a press conference, the newspapers printed it, and the nickname stuck. Richard Nixon, Barkley’s successor, refused to carry on the nickname, saying that it was a special term bestowed affectionately upon Alben. However, we still use this term today as a fun short-form for Vice President.