No, that is no insult. It stands for Boot Up Manager.
Comes in handy for older systems or people who doesn’t want unnecessary things running on their pc.
Since I’m on a desktop PC I turned off all things mentioning laptop in their discription and I turned off bleutooth too.
Installing can be done by searching for “bum” in synaptic or by entering this in a terminal window (applications -> accessories -> terminal):
sudo apt-get install bum
I suggest you read their bum-docs on how to use it.
The program can be found in “system -> administration -> Bootup-Manager”.