From Longman Dictionary of Contemporary Englishburn your bridges/boatsburn your bridges/boatsinformalDECIDE to do something with the result that you will not be able to return to a previous situation again, even if you want to I’m really tempted to take up that job offer in Washington, but I don’t want to burn my boats with this company. → burn
Examples from the Corpus
burn your bridges/boats• He was not one for burning his boats.• She had indeed burnt her boats.• She was acutely aware that she had burnt her boats.• And, now she'd burnt her boats so very finally, he would want it back. 