might/may as well

phrase

1

—used to say that something should be done or accepted because it cannot be avoided or because there is no good reason not to do it

You might as well tell them the truth.

We may as well begin now.

(informal) "Should we start now?" "Might as well."

2

—used to say that something else could have been done with the same result

The party was so dull that I might (just) as well have stayed home.