pretend not to know; play dumb
你们都在装蒜
You’re all playing dumb.
— 末代皇帝 (1987)
你少给我装蒜
Don’t play dumb with me.
— 少林足球 (2001)
不要装蒜啊。
Don't play dumb.
还装蒜
Still playing dumb?
— 喜剧之王 (1999)
还装蒜？
Still pretending you don't know?