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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.
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