first, second, etc. go

first go

On the first try. Primarily heard in UK. I can't believe I solved that difficult puzzle first go!
See also: first, go

second go

On the second try. Don't worry, honey—I'm sure you'll pass the test second go.
See also: go, second
Farlex Dictionary of Idioms.

first, second, etc. ˈgo

(British English) at the first, second, etc. attempt: I passed my driving test first go.
See also: go
Farlex Partner Idioms Dictionary
See also:
  • first go
  • be first out of the box
  • be first past the post
  • for a start
  • first past the post
  • first in, best dressed
  • first things first
  • first refusal
  • refusal
  • at first