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1.
Another saying for traffic.

Sitting in traffic, all you see are fronts and bumpers of cars, shorten that and you have "fronts and bumps".

Can also be used to describe anything unsatisfactory.
"Sorry I was late, it was all fronts and bumps on 101."

"Man, this party is all fronts and bumps. Let's get out of here."
by aftertheprequel March 04, 2010