shit or bust means: This is a rephrasing of “Certa Cito” the motto of Royal Corps of Signals, which means “Swift & Sure.” There is no direct definition. The phrase is merely a result of squad member humour. (in Community Dictionary, added by Jerónimo Gómez)

What else does shit or bust mean?

  • It’s all or nothing. Forcibly forced to make a decision. (in Community Dictionary, added by Celina Vázquez)