might as well

Related to might as well: leave no stone unturned, Through Thick and Thin, like it or lump it, no less, pick up the tab, so on and so forth

might as well

Should (do something), typically because there is no reason not to. The deadline is today, but you might as well send it in anyway—they may still accept it. A: "Are you going to work late tonight?" B: "I might as well. I have nothing else going on."
See also: might, well
Farlex Dictionary of Idioms.

might as well

 and may as well
a phrase indicating that it is probably better to do something than not to do it. Bill: Should we try to get there for the first showing of the film? Jane: Might as well. Nothing else to do. Andy: May as well leave now. It doesn't matter if we arrive a little bit early. Jane: Why do we always have to be the first to arrive?
See also: might, well
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

may/might as well (do something)

used for saying that you will do something because it seems best in the situation that you are in, although you may not really want to do it: Since nobody else wants the job, I might as well give it to him.
See also: may, might, well
Farlex Partner Idioms Dictionary
See also:
  • may as well
  • may/might as well
  • any (one) worth (one's) salt
  • keel over
  • young man
  • walk it off
  • walk off
  • cause (some) eyebrows to raise
  • cause raised eyebrows
  • raise some eyebrows