Of a situation, or machine that is not under control.(adjective)
Of a person, when one is not in control of one's actions.(adjective)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "out of control" in a sentence
"The idea of getting out of an upstairs shuttle seat wearing nearly ninety pounds of equipment and encumbered by an iron-hard pressurized Launch-Entry Suit (LES), then climbing down the narrow interdeck ladder and making it to the side hatch while the shuttle was in powered flight and/or tumbling out of control (the two most common conditions of aircraft ejections) was a fantasy."
"Indeed, Bill and Keet will tell you that they, too, have felt out of control at various times in their lives."
"Like the rest of our bodies, our skin needs a sanctuary from irritants and assaults in order to recover its pro-beauty functions and reverse the compounded problems that can get out of control once these basic functions are compromised."