Meet Justin...

...Justin Bimmer :)

So just why is a BMW car called a 'bimmer' not a 'beemer' or 'beamer'?

Bimmer vs Beemer
Enthusiasts vs others
Definitions:
Bimmer - proper accepted slang for BMW cars. Most people don't know this.
Beamer/Beemer - proper accepted slang for BMW motorcycles. You will hear this term used incorrectly by many people.
Bummer - When you get a speeding ticket. Hahahaha!!!