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slang A motorcycle, often specifically a Japanese sports bike. Some dude on a crotch rocket just shot past me doing about 100. Of course I wouldn't get a crotch rocket like that—I'm a Harley man.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
n. a motorcycle. (For some, only foreign motorcycles are so called.) I can buy a nice car for less than you paid for that crotch-rocket.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.