knock on wood
US /nɑk ɑn wʊd/
UK /nɑk ɑn wʊd/

1.
나무를 두드리다, 액운을 막다
said to ward off bad luck, often while knocking on a wooden object
:
•
I haven't had a cold all winter, knock on wood.
이번 겨울 내내 감기에 걸리지 않았어, 나무를 두드리며.
•
Our business has been doing great this year, knock on wood.
올해 우리 사업이 잘 되고 있어, 나무를 두드리며.