Wiktionary
vb. 1 (context idiomatic English) To do something alone or independently, especially something that is normally or better done in groups. 2 (context card games English) To play a hand without the assistance of one's partner.
Usage examples of "go it alone".
After the strike on the Pennsylvania Railroad in 1877, he broached a scheme to have the Locomotive Engineers make terms with the railroads and to 'go it alone' so far as the rest of the labour unions were concerned.
I conducted the interview, in tandem with Captain Leland, who was not about to let me go it alone.
I was told two things in reply: one, if he had had to go it alone, he would have led the fleet through and left them at a great distance from shore, returned in a single vessel to Avernus and led his foot soldiers forward to rendezvous at a given time.
It's bad enough to have the lunatic element in the Keys pressing for us to go it alone in the wake of the Star Kingdom's 'insults' to Grayson and to one of our steadholders in particular.