1.) Character from His Dark Materials series. Baddest motherfucker around. Drives a hot-air balloon and don't take shit from nobody.

2.) Someone who displays aggressive levels of bad-assness.

Definition 2:

"Did you just see that guy shoot the other dude with a .45 cocked sideways, blindfolded!? In a snow storm?!"
"He's one bad-ass Lee Scoresby."
by Zegeroth September 26, 2007
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