/bok/
a strong, dark beer typically brewed in the fall and aged through the winter for consumption the following spring. Also called bock .
[ 1855-60; Bock, Bockbier lit., buck beer, perh. by misdivision of Eimbecker Bier (as if ein Bockbier one Bockbier) beer of Eimbeck in Lower Saxony, Germany ]