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gallop through (something)
1. Literally, to travel on horseback very quickly through some place or area. (A "gallop" is a running stride by a horse.) My horse galloped through the countryside while I clung to the reins in terror.
2. By extension, to do something hastily and, often, sloppily. I can tell you galloped through this essay—look at all these spelling errors!
slang Lice. Ugh, I'm so itchy—I really hope it's not galloping dandruff.
Cheyletiellosis, a contagious skin disease affecting dogs and cats cause by an infestation of parasitic Cheyletiella mites. The condition causes excessive dandruff, but the euphemistic name also refers to the fact that the mites are large enough to be seen moving on the top layer of the animals skin. The poor animal was crawling with walking dandruff by the time his owners brought him in for treatment. That's not just dandruff on your cat—that's walking dandruff. You'll need to see a vet about that.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
walking dandruffand galloping dandruff
n. lice. (see also pants rabbits.) The bum called his lice “walking dandruff.” I don’t know anybody with galloping dandruff—I hope.
See walking dandruff
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.