(slang, derogatory) A rude, obnoxious, or annoying person.

(idiomatic) To address a problem, especially an unexpected one caused by the incompetence, negligence, or misconduct of another person. / Used other than figuratively or idiomatically: put out a fire.

Alternative spelling of trailblazing

(systematics): A biologist who studies clades, an evolutionary biologist who studies the pattern of species interrelationships according to the principles of cladistics.