The Choding (초딩), is an abbreviation of Cho deung hak sang (초등학생, elementary school student).
Sometimes refers to actual elementary school, can also be used to indicate an adult to act as elementary school level and children. <Slang expression of student> -elementary students "초딩 Choding, 초등학생 Cho deung hak sang" , junior high school students "중딩 Jung Ding, 중학생 Jung hak sang" and high school students is "고딩 Goding, 고등학생 Godeung hak sang" - college students "대딩 Deding, 대학생 Da hak sang "