have (one's) head up (one's) ass
(redirected from having their heads up their asses)have (one's) head up (one's) ass
rude slang To be acting in a way that others deem stupid. Primarily heard in US. He has his head up his ass if he thinks we can get all of this work done in one night.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
have (one's) head up (one's) ass
To behave in an ignorant or foolish manner.
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.