As well be hung for a sheep as a lamb.

When punishment for a smaller wrongdoing is no lighter than that for a greater one, a person may reason that restraint has lost its practical value. The saying voices a fatalistic choice to accept the larger risk once serious consequences seem unavoidable.

It can also criticize that reasoning rather than endorse it. Equal or indiscriminate penalties can encourage escalation, because someone expecting the worst outcome may see little incentive to limit further misconduct; its image of hanging underscores the severity of the consequences imagined.

Use it when someone argues that, having already incurred severe blame or danger, they might as well take an additional or greater step. It may be quoted ironically to expose reckless all-or-nothing thinking, but its reference to execution can sound flippant when real harm or punishment is at issue.