1. To no longer be pestering or annoying one; to not be one's responsibility or burden any longer. The kids got out of my hair for a few hours so that I could go and get a relaxing massage by myself. Once these auditors from the IRS get out of our hair, we can get back to business as usual.

2. To cause someone else to stop pestering or annoying one. In this usage, a noun or pronoun is used between "get" and "out." Can you please get the kids out of my hair for a few hours so I can go and get a relaxing massage by myself?