catch a crab

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catch a crab

To make a poor stroke while rowing, perhaps by missing the water entirely. The boat jerked as I caught a crab with my oar.
See also: catch, crab
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

catch a crab

(in rowing) effect a faulty stroke in which the oar is jammed under water or misses the water altogether.
See also: catch, crab
Farlex Partner Idioms Dictionary © Farlex 2017

catch a crab

To make a faulty stroke in rowing that causes the blade of the oar to strike the water on the recovery stroke.
See also: catch, crab
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.
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