Bus means mischief, but its connotations are not entirely negative. The kind of mischievous but harmless play that children often engage in, like stealing apples from the grumpy neighbour, that is bus. Calling your child a busfrö(seed of mischief) is just a term of endearment. The picture above is from a children’s book by Astrid Lindgren, about Emil i Lönneberga, the iconic Swedish busfrö.
bus - mischief buss - bus (as in vehicle) att busa - to make mischief busunge - mischievous child busfrö - mischievous child (literally seed of mischief) buse - mischievous boy busa - mischievous girl busliv - rowdyism, petty crime (literally mischief life) bus eller godis - trick or treat (literally mischief or candy)