1. To move or act in a clumsy, confused, or inefficient manner; to wander aimlessly while bumping into things or making mistakes
He bumbled around the kitchen looking for a coffee mug.
Ele andava aos tropeços pela cozinha procurando uma caneca de café.
2. To handle a task poorly or inefficiently; to bungle about
The new employee bumbled around trying to figure out the computer system.
O novo funcionário mexia-se desajeitadamente tentando entender o sistema de computador.