Laich - A swear word that Ottawa people use like it's going out of s

A swear word that Ottawa people use like it's going out of style. It's like the F word, but with a Canadian twist and a bit of Yiddish sass.

My friend said 'Laich' when the bus was late again.

My teacher said 'Laich' when we didn't do our homework.

My dad said 'Laich' when my mom cooked burnt toast.