a person who is clumsy, out of it, etc. but also manages to be adoreable.
Neville Longbottom is so bumbly--I just want to give him a hug!
An inexperienced rock climber out for the weekend, most probably a product of a local climbing club (VCC) weekend course.
They classically turn up late and walk to the crag sporting near unused climbing equipment habitually including a double set of 'bumbly bell' (hexes) and make a gawd awful racket too early in the morning. They then proceed to epic on the easiest climbs, leaving half their expensive gear behind for the resident climbing bums to then solo, steal and sell over the camp fire.
Hey, check out those bumbly VCC idiots, should we rescue them?
Nah, let's climb behind them and steal their gear...
a misspelling of bubbly, when referring to a ditzy or cheery-like personality. It evokes a funnier, light-hearted, and possibly clumsier spirit than bubbly.
It was a lot of fun talking to her; she's very bumbly, not bubbly, which is more entertaining!