noun
wild upbringing; untutored; rough around the edges
Describes a person who grew up without formal education or refinement, often with a connotation of being rough but natural. Can be used affectionately or critically.
彼は野育ちだが、とても礼儀正しい。
He grew up rough, but he is very polite.
野育ちの子はたくましい。
Children raised in the wild are tough.
Compound of 野 (の, 'field, wild') and 育ち (そだち, 'upbringing, growth'). The exact historical derivation is uncertain, but the word literally suggests being raised in the wild.