Great expression: “aft gang awry,”
I’m gonna have to remember that one.
Well, since you are going to remember it, I guess I'll have to correct it. It comes from Robert Burns' poem "To a Mouse" and the two lines are: "The best-laid schemes 'o mice an' men/ gang oft agley..." (meaning "often go awry"). It's also the source of Steinbeck's title "Of Mice and Men." The phrase is often misremembered as "The best laid plans of mice and men often go awry," but the original is written in Burns' Scottish dialect.