In the film 'Bang Bang You're Dead', the Trogs were planning to get retaliation against the Jocks by having a shootout in the school cafeteria.
Trevor - "Trogs. Guns."
Girl - "Did you hear that the Trogs started hanging out with the 'Mad Bomber'?"
You use it to talk about girls who are ugly sluts.
It originated on the island of kauai at kula school.
D Mar is such a trog, she fucks a new guy every week.