From Longman Dictionary of Contemporary Englishwith/knowing somebody’s luckwith/knowing somebody’s luckspoken used to say that you expect something bad to happen to someone because bad things often do happen to them With my luck, I’d lose if I backed the only horse in a one horse race. → luck
Examples from the Corpus
with/knowing somebody’s luck• Knowing his luck, he'll get hit with a golf ball or something. 