Saw a license plate with #1 MUGGA on it. What does it mean?

It was from a mid western state, can't remember which one and there was a fairly young (30ish) middle class couple in the car. I thought it might be a college team nickname, but when I goggled it all I could find was the following and they didn't seem to fit. Anyone have any thoughts?


Conventional Definition:
an Australian eucalyptus tree with dark bark and pink flowers,

Urban Dictionary
mugga
A Philly word meaning money. Started by Philly rapper Joey Jihad AKA Mr. Mugga
I ain't worried about you dudes, I'm trying to get my mugga right