an act of washing: Allow five minutes for washup.
a place, as a bathroom, for washing.
Origin of washup
First recorded in 1865–70; noun use of verb phrase wash up
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for washup
Historical Examples of washup
“I think”—began Tom, when they were down in their staterooms taking a washup before the noon meal.Frontier Boys in the South Seas