CROSS THE RUBICON
cross the Rubicon: translation
cross the Rubicon
Fig. to do something that inevitably commits one to following a certain course of action. (Alludes to the crossing of the River Rubicon by Julius Caesar with his army, which involved him in a civil war in B.C. 49.) •
Jane crossed the Rubicon by signing the contract.
•
Find another job before you cross the Rubicon and resign from this one.