What does koupe tet boule kay mean?

Near the end of the successful slave uprising in Haiti, General Jean-Jacques Dessalines, an illiterate and ferocious former field slave, who had succeeded Toussaint [Louverture] as leader, gave his troops a now celebrated order: "Koupé tet, boulé kay!"-"Cut off heads, burn houses!"

[Mark Danner. "Reporter at Large (Haiti-Part II)" in New Yorker (4 December 1989) 73]