A ching chong lil dong, that has big dong desires. This is due to his innate perverted nature. He is the type of guy to look at half-dressed women on Instagram 24/7. He's a quintessential virgin. His life as a virgin brings deep pain but he reconciles this by looking at half-dressed women on Instagram.
Jia is home in Chinese whereas Jian means build.. Thus, JiaJian carries the meaning of home building(literal translation). In layman term, it means a guy who put emphasis on family building.