A dwarf, descendant of the Dwarves of Moria but not of Durin’s line.

In The Hobbit, Bombur is recorded as wearing a pale green hood. He played the drum and had a liking for pork-pie and salad. He was very fat.

With his brother Bofur and cousin Bifur, Bombur accompanied Thorin II on the Quest of Erebor in TA 2941. Though fat he was reasonably fit, and carried Bilbo for a while in the tunnels of the Misty Mountains despite being terrified and grumbling constantly. In Mirkwod, Bombur fell into the Enchanted River which sent him into a deep sleep which lasted some days. Being rather fat, it took four dwarves to carry him.

At the Lonely Mountain after the death of Smaug it was Bombur who swapped his watch period with Bilbo who used the time to slip away and bargain with Bard and the Elvenking.

Bombur survived the Battle of Five Armies, after which he settled in the Kingdom under the Mountain where he became ever more corpulent until it took 6 young dwarves to carry him from his chair to the table.
Encyclopedia entry originally written by Ainulindale