Wiktionary
go it
vb. 1 To behave in a wild, uproarious manner; to carry on. 2 To proceed; to make progress.
Usage examples of "go it".
Jinx is staring at her as if he has never seen her before, he's going to let her go it seems, slamming into the bathroom where maybe like other times she'll have sense enough to poke a forefinger down her throat and bring up hot gushing splashes of vomit to empty her stomach and help clear her head.
As experiences go it was about as nostalgic as cramming for a tax audit.