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Related to bolt-on: Bolt-On Acquisition
Describing women's breasts that have been surgically altered. Her boobs were never that big before—I bet she had some bolt-on work done.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
mod. [of a woman’s breasts] surgically augmented. That’s a bolt-on job if I ever saw one.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.