on-ramp hero

Driver who, when entering the freeway, attempts to pass every car possible via the on-ramp before merging as the on-ramp ends (despite having numerous opportunities to merge safely prior). Of course, if oneself is doing it you're an on-ramp hero. If someone else is doing it, they're simply an asshole.

Passenger in my car: "Dude! On-ramp hero. You can pass a least six more cars."

Some jerk trying to play on-ramp hero nearly caused a wreck on my way to work.