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To live by oneself, as an unwed man (or "bachelor") does. The phrase can be "bach it" or simply "bach." I used to bach it, until I met and married the love of my life.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
See batch it
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
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.