没事人

not care in the least; give ( or take) no heed; be indifferent

♦ 你怎么批评他, 他还像个~似的。 However much you criticize him, he still looks unconcerned.

♦ 喝了一瓶酒, 他跟~似的。 After drinking a whole bottle, he didn't even turn a hair.