The phrase "short doc" refers to a short documentary film. It means a movie that tells a true story or presents real-life events or people, but it is shorter in length compared to a full-length documentary. Full definition
SNUB: «City of Ghosts» for Best Documentary Feature: Docs about the ongoing Syria crisis have been fertile ground for award winning docs like «Last Men In Aleppo» and last year's Best Short Doc winner, «The White Helmets.» (thewrap.com)
5 Best Bets on TV This Week: Chiwetel Ejiofor Gets Jazzed, HBO Offers Its Oscar - Nominated Short Docs and Two Famous Lovers Battle It Out (indiewire.com)
In New York City, wearing a black crop - top turtleneck, under a moss green suit coat and matching pants, with short Doc Marten boots, and orange - tinted small - frame sunglasses. (harpersbazaar.com)