crow over - Phrases/Idioms
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Exult loudly about, especially over someone's defeat. For example, In most sports it's considered bad manners to crow over your opponent. This term alludes to the cock's loud crow. [Late 1500s]