Also found in: Thesaurus, Idioms.
intr.v. flat-hat·ted, flat-hat·ting, flat-hats
To fly an airplane close to the ground and at a high or dangerous speed.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.