To burn the boats is a metaphor for destroying any safety net you have. To go all in and decide to go after it regardless of the outcome. It originated from the conquering of the Aztecs by Cortez. Once they reached the shore of Mexico Cortez decided to tell his men to burn the boats. Meaning they would either die or conquer the land.
Tim: â man I canât leave this job, Iâll be homeless. I hate what Iâm doing but I canât quit and find something better. Itâs too risky.â
John fucking Rambo: âburn the boats you pussy.â
Tim: â man I canât leave this job, Iâll be homeless. I hate what Iâm doing but I canât quit and find something better. Itâs too risky.â
John fucking Rambo: âburn the boats you pussy.â