under age
The American Heritage® Idioms Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
Examples from the Web for under-age
Contemporary Examples of under-age
We heard multiple reports of proxy and under-age voting and ballot stuffing, and bias by Independent Election Commission staff.
Historical Examples of under-age
Those are the very hours you under-age fellows are not here.
The Story of LeatherSara Ware Bassett
Two under-age girls were found there, but the madam got off with a fine and the girls disappeared.