A mob is any computer-controlled, non-player character (NPC). In Deepworld, the term "mob" refers not only to hostile creatures, but to any creature other than players. There are hostile mobs, like terrapi and brains, and non-hostile mobs, like butterflies and skunks. There are flying mobs and walking mobs and crawling mobs. Some mobs will follow you around, others will shoot at you as they pass by, others will completely ignore you. Some, like androids, will even stop and have a conversation!
For more information about individual mobs, see their respective pages.
Related page: Mob Mechanics