1. to switch lanes while approaching a light in hopes of advancing positions in the queue. esp. to advance one position by switching lanes.
2. any manuever to outdo an adversary.
1. I got 1-upped by that slut in the Beamer up there cause she couldnt wait behind that dump truck.
2. MacGyver could 1-up anyone in any situation except his nemesis Murdoch.
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