Off-centered strike. I also have a Lincoln cent, Washington quarter, and Kennedy half dollar struck off-center also. Jefferson's been on the Nickel a long time. Can't blame him for trying to sneak off the obverse. Like in your coin. Maybe it's about time he was promoted to Dime status? LOL
That's what I thought at first, but upon closer examination of my coin I see it has no distinct rim like all the other off-center strikes shown here, and the rim area at the top of the design is not perfectly curved but rather distorted somewhat.
It retains a lot of the characteristics of the blank planchet used to produce the coin. When struck correctly, a rim is formed.