Fatman

: The bomb-obsessed, roller-skating villain from Metal Gear Solid 2: Sons of Liberty ?

: The point-and-click adventure game Adventures of Fatman ? Fatman

: The iconic mini-nuke launcher from the Fallout series (Fallout 3, 4, or 76)? : The bomb-obsessed, roller-skating villain from Metal Gear

That depends on which "Fatman" you're looking for, as it's a popular name in games and movies. Could you clarify if you mean: : The bomb-obsessed

: The 2020 action film Fatman starring Mel Gibson as a rowdy Santa Claus?