expression, godan verb (-su)
run an errand; take care of business
General expression for going out to handle a task or errand, such as shopping, banking, or other practical matters.
ちょっと郵便局へ用を足しに行ってきます。
I'm going to run an errand at the post office.
expression, godan verb (-su)
go to the toilet; relieve oneself
Euphemistic expression for using the toilet. Common in polite or indirect speech.
すみません、ちょっと用を足してきます。
Excuse me, I need to go to the restroom for a moment.