first, second, etc. go
On the first try. Primarily heard in UK. I can't believe I solved that difficult puzzle first go!
On the second try. Don't worry, honey—I'm sure you'll pass the test second go.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
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 © Farlex 2017