'To go it alone' definitions:

Definition of 'To go it alone'

From: GCIDE

Go \Go\, v. t.
1. To take, as a share in an enterprise; to undertake or become responsible for; to bear a part in. [1913 Webster]
They to go equal shares in the booty. --L'Estrange. [1913 Webster]
2. To bet or wager; as, I'll go you a shilling. [Colloq.] [1913 Webster]
To go halves, to share with another equally.
To go it, to behave in a wild manner; to be uproarious; to carry on; also, to proceed; to make progress. [Colloq.]
To go it alone (Card Playing), to play a hand without the assistance of one's partner.
To go one's way, to set forth; to depart. [1913 Webster]