in you go says bob munro, phr. — Green’s Dictionary of Slang

in you go says bob munro phr.

also off they go says bob munro

[ety. unknown; ? anecdotal or simply assonant]

(N.Z.) a general phr. of encouragement at the outset of a project, competition etc.

1959		G. Slatter Gun in My Hand 345: ‘Well, in ya go says Bob Munro,’ he toasts and we drink some slowly.
1988		McGill Dict. of Kiwi Sl.
2003		McGill Reed Dict. of N.Z. Sl. 146: Off they go, says Bob Munro The mysterious Bob Munro again, this time signalling the start of something, like a race or the divesting of clothes preparatory to sex.