Slang Lacking assurance, self-control, or sophistication.
Slang Not in accord with the standards or mores of a specified group: "trying to teach children simply to reject drugs as uncool” ( Larry Martz).
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.