v. Simple past tense and past participle of pigeonhole.
The Century Dictionary and Cyclopedia
Formed with pigeonholes for the escape of gases of combustion, as the arch of a furnace, or for the discharge of liquids, as the bottom of a keir.
Word Usage
"Maybe they don't like being "pigeonholed" and react badly to any suggestion that there's a model into which they can placed; maybe they're just so practical that they can't abide any theory at all; maybe they just enjoy sticking a knife into the creative work of others."