acey-deucey
noun
ac·ey-deuc·ey ˌā-sē-ˈdü-sē 
-ˈdyü-
variants or less commonly acey-deucy
: a variation of backgammon in which a throw of a 1-2 wins extra turns
Word History
Etymology
from acey-deucy "a dice roll of a one and a two," from acey (from ace entry 1 + -y) + deucey, from deuce entry 1 + -y
First Known Use
1925, in the meaning defined above