One might as well be hanged for a sheep as for a lamb
Possible interpretation: If you are going to be killed for stealing a lamb, then why not steal a sheep (which is bigger and more valuable)? In general, it means that if you are going to get the same punishment, you may as well commit the greater offence.Note: be hanged (verb) = be killed by having a rope placed around one's neck and being allowed to drop (a form of execution) | sheep (noun) = animal that gives us wool and meat | lamb (noun) = baby sheep | Also seen as: "One might as well be hung for a sheep as (for) a lamb" and (originally) "As well be hanged for a sheep as a lamb."
Origin: Under English law before the 1820s people were hanged for stealing anything worth more than a shilling. This included lambs and sheep. So why steal a lamb when you could steal a more valuable sheep and get the same punishment (death)?