A specific road violation in which, while making a left-hand turn onto a double-laned road, the driver immediately pulls into the right lane instead of properly turning into the left lane and then, with blinker, merging into the right lane. The term is named after the Canadian city "Thunder Bay" in which this aforementioned violation is rampant and part of everyday driving.
In a hurry, he pulled a Thunder Bay, not noticing the vehicle on the ramp that wanted to merge onto the road.
noun: the greatest action flick ever. No hesitation, never surrender, no man left behind. From the "Thunder Gun Express" episode of "Always Sunny in Philadelphia"
verb: used in a variety of ways, but mainly to denote overcoming an obstacle, to win, or be triumphant.
1. We need to hurry up, Thunder Gun, the greatest action flick ever, starts in five minutes and we might miss it!
2. "We're never gonna make it, we're stuck in traffic"
"Just Thunder Gun the curb!"