a pupil in a grade school.
Origin of grade-schooler
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for grade-schooler
Contemporary Examples of grade-schooler
Every time I pass a bank and see one, I giggle like a grade-schooler.Six Words That Mean Something VERY Different to Porn Stars
March 29, 2013