hands up - Phrases/Idioms
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
A direction or order to hold one's hands high, as in Hands up or I'll shoot! This imperative is used by police officers and criminals so that they can see if someone is holding a weapon. [Second half of 1800s]