Loss of inhibition, as through the influence of external stimuli such as drugs or alcohol, or as a result of brain damage.
Unrestrained behavior resulting from a lessening or loss of inhibitions or a disregard of cultural constraints.
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.