Mobbin apparently means: 'Money Over B!*#^%s Because Its Necessary.'
A group of lame Yuba City
kids has created a Mobbin group.
People all over town laugh at their idiotic hand signs and feeble attempt at being a gang.
This group is steadily growing, and people are making fools of themselves in pictures all over facebook.
"hey are those kids doin the mobbin sign"
"oh look another picture of kids doin the mobbin sign"
"those kids are definately mobbin, how very Yuba City