Senses
牛棚 cowshed
cowshed; cattle pen; a shelter or stable for oxen and cows
牛棚 makeshift prison
A makeshift detention center or holding-place where intellectuals and officials were held during the Cultural Revolution, named because prisoners were branded as 牛鬼蛇神 .
牛棚 bullpen
(baseball) The area where relief pitchers warm up; also refers to a team's group of relief pitchers.