throw up your hands/arms in despair, horror, etc.(redirected from throw up your arms in horror)
throw up (one's) hands in despair
To indicate one's unwilling and despairing submission to or acceptance of something. We threw up our hands in despair after they told us that our appointment had been rescheduled again for a third time. All you can do is throw your arms up in despair at the way the government is being run these days.