might as well be hung for a sheep as a lamb

might as well be hung for a sheep as (for) a lamb

Rur. might as well commit a large fault as a small one, since the same punishment will result. I'll take the expensive fishing rod. My wife will be mad at me no matter how much I spend, so I might as well be hung for a sheep as for a lamb.
See also: hung, lamb, might, sheep, well