This is Tobias Menzies, aka Frank Randall and Black Jack on Outlander.
Some TV fans may may know Menzies as Edmure Tully on Game of Thrones or Nathaniel Bloom on The Honourable Woman, but most recently, he's been playing two very different characters on Outlander — as Frank Randall, a 20th century reticent history buff, and his ancestor, Black Jack, an 18th century pillaging, pompous tyrant.
While Outlander is primarily set in the Scottish hillsides, in real life, Menzies is English. So we figured that if anyone would know the meaning behind old English insults, it would be him.