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1.
To wander in a happy but slightly disengaged state, though with some harmless or ineffective intent. A certain business is implied. bimble Often used in British Army
Chickens aren't usually bimbling, but a mother duck and a line of ducklings crossing a road and heading into fields probably are. A duckling that breaks away from the group, explores busily and then returns has just had a bimble.

In the Sahara miles from anywhere, a guy walked out of the midday haze carrying nothing but a piece of wood, passed by 50 yards away without looking at us, and headed into the heat. Now HE was bimbling.
by Wuggy December 07, 2007
 
2.
To amble without real aim, yet in a friendly and harmless manner.

It's not required to achieve anything whilst Bimbling, although it's aimlessness is a frequent side effect.

Bimbling can be made a little more business like with a slight hunch of the shoulders.

It is not essential that Bimbling should be a solo sport.
Blissfully bimbling through life without a care in the world.
by World Bimbling champion March 01, 2011