He and his family members are shown to misuse idioms in ways that make them appear foolish and comical, despite their intention to insult or intimidate.

He lives with his grandmother, Gertrude Tannen (voiced by Wilson), at 1809 Mason Street and proudly owns a black 1946 Ford Deluxe convertible.

Consequently, on his 21st birthday in 1958, Biff's younger self wagers money on a horse race listed in the almanac with the victorious steed's name revealed, winning his first million dollars and giving himself prestige and increasingly arrogant confidence.

This incident explains why the elderly Biff's actions have no visible effect on the Hill Valley of the future and, after returning to 2015, he clutches his chest in pain, sinks to the pavement, and fades from existence.

Throughout the Back to the Future franchise, Tannen is shown to have various ancestors or descendants in various timeline who share Biff's character traits, and in the films, are also played by Thomas F. Wilson.

Back to the Future Part III shows Biff's great-grandfather, Buford "Mad Dog" Tannen, was a vicious Outlaw in the Wild West of 1885, Hill Valley.

As the October 2015 date featured in the films approached, media outlets began noting the similarities between the alternate 1985 version of the character and Donald Trump, who at the time Part II was produced had just purchased the Plaza Hotel in New York City and, by 2015, was in the midst of an ultimately successful run for President of the United States.

[5] Both The Daily Beast and Rolling Stone note the similarities of Biff's casino penthouse to Trump Plaza Hotel and Casino;[5][6] additionally, The Beast points out that in Back to the Future Part II:Biff uses the profits from his 27-story casino... to help shake up the Republican Party, before eventually assuming political power himself, helping transform Hill Valley, California, into a lawless, dystopian wasteland, where hooliganism reigns, dissent is quashed, and wherein Biff encourages every citizen to call him "America's greatest living folk hero".