A weeaboo who believes they are a credible threat.
Usually they are more talk than action, but they are known to randomly
strike out to prove themselves. Rarely would a dangerboo manage to overcome an opponent who has basic skill.
A dangerboo is often heard to say that they are skilled in
martial arts, that they have "studied
the blade" (always a katana), and that actually a weapon is a handicap because of how deadly they are with their bare hands.