A fall, typically off of something being ridden, such as a bike, motorcycle, or horse. Did you her about Tara? Her involuntary dismount yesterday earned her a trip to the OR and two months in a cast. I gave up motorcycles after one too many involuntary dismounts.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
n. falling off a bike or motorcycle. He impacted a monolith and suffered an involuntary dismount.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.