to have a dig at sb or to take a dig at sb讽刺(或挖苦)某人
Americans are always quick to have a dig at the British.美国人总是动不动就嘲讽英国人。
She couldn't resist having a dig at her sister, even on the latter's wedding day.她总是忍不住要挖苦她妹妹一番, 甚至在妹妹婚礼那天也不例外。
Whenever she can, she takes a dig at me.她一有机会就挖苦我。